ORCID Profile
0000-0003-4091-6040
Current Organisations
E O Lawrence Berkeley National Laboratory
,
University of Tasmania
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Organometallic Chemistry | Other Chemical Sciences | Organometallic Chemistry | Physical Organic Chemistry | Organic Chemistry | Food Packaging, Preservation and Safety | Ore Deposit Petrology | Geology | Organic Chemical Synthesis | Separation Science | Organic Chemical Synthesis | Chemical Sciences Not Elsewhere Classified | Genetics | Plant Biology | Pharmaceutical Sciences | Biological Oceanography | Igneous and Metamorphic Petrology | Marine and Estuarine Ecology (incl. Marine Ichthyology) | Medical Biochemistry: Proteins And Peptides | Post Harvest Horticultural Technologies (incl. Transportation and Storage) | Organic Chemistry Not Elsewhere Classified | Conservation and Biodiversity | Freshwater Ecology | Analytical Chemistry | Analytical Spectrometry | Catalysis and Mechanisms of Reactions | Transition Metal Chemistry | Inorganic Chemistry | Chemical Oceanography | Phycology (incl. Marine Grasses) | Plant Cell and Molecular Biology | Plant Physiology | Theoretical and Computational Chemistry not elsewhere classified | Forestry Pests, Health and Diseases | Gene Expression | Crop and Pasture Biochemistry and Physiology | Environmental Chemistry (Incl. Atmospheric Chemistry) |
ANZSRC Socio-Economic Objective (SEO)
Chemical sciences | Expanding Knowledge in the Chemical Sciences | Biological sciences | Organic industrial chemicals not classified elsewhere | Hardwood plantations | Field crops | Earth sciences | Physical and chemical conditions | Integrated (ecosystem) assessment and management | Other | Field crops not elsewhere classified | Plastic products (incl. Construction materials) | Endocrine organs and diseases (incl. diabetes) | Food safety
Related Links
Publications
Computational Study of Intramolecular Arene Palladation at a Palladium(IV) Center
Publisher: American Chemical Society (ACS)
Date: 04-03-2015
DOI: 10.1021/OM5013049
Oxidatively Induced Aryl–CF3 Coupling at Diphosphine Nickel Complexes
Publisher: American Chemical Society (ACS)
Date: 20-12-2019
Ligand effects in bimetallic high oxidation state palladium systems
Publisher: American Chemical Society (ACS)
Date: 02-11-2010
DOI: 10.1021/IC1020912
Abstract: Ligand effects in bimetallic high oxidation state systems containing a X-Pd-Pd-Y framework have been explored with density functional theory (DFT). The ligand X has a strong effect on the dissociation reaction of Y to form [X-Pd-Pd](+) + Y(-). In the model system examined where Y is a weak σ-donor ligand and a good leaving group, we find that dissociation of Y is facilitated by greater σ-donor character of X relative to Y. We find that there is a linear correlation of the Pd-Y and Pd-Pd bond lengths with Pd-Y bond dissociation energy, and with the σ-donating ability of X. These results can be explained by the observation that the Pd d(z(2)) population in the PdY fragment increases as the donor ability of X increases. In these systems, the Pd(III)-Pd(III) arrangement is favored when X is a weak σ-donor ligand, while the Pd(IV)-Pd(II) arrangement is favored when X is a strong σ-donor ligand. Finally, we demonstrate that ligand exchange to form a bimetallic cationic species in which each Pd is six-coordinate should be feasible in a high polarity solvent.
The crystal structures of disordered crystals of adducts of diphenylmercury with bidentate ligands
Publisher: International Union of Crystallography (IUCr)
Date: 15-06-1972
Crystal Structure of Dimethyl-[tris(N-methylimidazol-2-yl)methanol-N,N']-gold(III) Nitrate
Publisher: CSIRO Publishing
Date: 1985
DOI: 10.1071/CH9851251
Abstract: Crystals of dimethyl [ tris (N-methylimidazol-2-yl) methano -N,N′]gold(III) nitrate are monoclinic, P21/c, a 8.217(3), b 14.010(5), c 16.800(6) Ǻ, β 101.93(3), Z 4. The cations have the ligand coordinated as an N,N′- bidentate to cis-Me2AuIII, giving square-planar geometry for gold, together with an uncoordinated N-methylimidazol-2-yl ring above the coordination plane.
Alkene analogues of bis(N-donor)ketone ligands: ruthenium(II) complexes containing 1-(pyridin-2-yl)-1-(N-methylimidazol-2-yl)ethene and 1,1-bis(N-methylimidazol-2-yl)ethene ((mim)2CCH2), and structur
Publisher: Elsevier BV
Date: 02-1997
The magnetic properties of the cyclopentadienyltitanium(III) derivatives, cpTiCl2, cp2TiCl, and cp3Ti
Publisher: CSIRO Publishing
Date: 1968
DOI: 10.1071/CH9680807
The van der Waals radius of mercury
Publisher: Elsevier BV
Date: 1980
Stoichiometric and Catalytic Aryl–Perfluoroalkyl Coupling at Tri-tert-butylphosphine Palladium(II) Complexes
Publisher: American Chemical Society (ACS)
Date: 11-08-2017
DOI: 10.1021/JACS.7B05216
Abstract: This Communication describes studies of Ph-R
Computational study of C(sp3)–O bond formation at a PdIV centre
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT00096K
Abstract: This report describes a computational study of C(sp 3 )–OR bond formation from Pd IV complexes of general structure Pd IV (CH 2 CMe 2 - o -C 6 H 4 - C , C ′)(F)(OR)(bpy- N , N ′) (bpy = 2,2′-bipyridine).
Trimethylpalladium(IV) complexes of flexible bidentate ligands. Conformational and fluxional effects in related Me3PdIV and Me3PtIV systems
Publisher: Elsevier BV
Date: 03-1989
Nuclear magnetic resonance and potentiometric studies of the complexation of methylmercury(II) by dithiols
Publisher: Canadian Science Publishing
Date: 09-1985
DOI: 10.1139/V85-402
Abstract: Complexation of methylmercury, CH 3 Hg(II), by 2,3-dimercaptosuccinic acid (DMSA), 2,3-dimercaptopropanesulfonate (DMPS, Unithiol), dithioerythritol (DTE), and 2,3-dimercaptopropanol (British AntiLewisite, BAL) has been studied by 1 H nuclear magnetic resonance spectroscopy and by potentiometric titration. In the nmr study, the equilibrium constants for displacement of mercaptoacetate from its CH 3 Hg(II) complex by the dithiols were determined over a wide pH range, from mercaptoacetate chemical shift data. Similar competition reactions between the dithiols and mercaptoethanol were used in the potentiometric study. Using previously determined CH 3 Hg(II) formation constants for the competing ligands, equilibrium constants for the formation of mono- and bis-CH 3 Hg(II) complexes with the dithiols have been determined. The formation constants for the mono-CH 3 Hg(II) complexes with the vicinal dithiols BAL and DMPS are significantly higher than expected by consideration of the basicity of the sulfhydryl donors, in comparison with those for DMSA, non-vicinal DTE, and monothiols. We interpret this to indicate chelation of CH 3 Hg(II) by BAL and DMPS but not by DMSA. The conditional formation constants at physiological pH are discussed with reference to the effectiveness of BAL, DMPS, and DMSA as antidotes for methylmercury poisoning. In particular, the constants obtained indicate that, for dithiol antidotes at concentrations greater than that of methylmercury (II), methylmercury(II) complexes formed at physiological pH are of 1:1 stoichiometry. For BAL, a substantial proportion of the complex will be in the neutral form, in contrast to DMPS and DMSA which form anionic species only.
Trimethylpalladium(IV) chemistry. Conformational and fluxional effects in related palladium(IV) and platinum(IV) complexes of flexible bidentate nitrogen donor ligands
Publisher: Elsevier BV
Date: 03-1990
Interaction of methylmercury(II) with bidentate ligands containing pyridine and pyrazole rings. Synthesis and structure of methyl[1-(2-pyridyl)pyrazole]mercury(II) nitrate and [di(1-pyrazolyl)methane]methylmercury(II) nitrate
Publisher: International Union of Crystallography (IUCr)
Date: 15-03-1982
Mechanism of Pd-Catalyzed Ar–Ar Bond Formation Involving Ligand-Directed C–H Arylation and Diaryliodonium Oxidants: Computational Studies of Orthopalladation at Binuclear Pd(II) Centers, Oxidation To
Publisher: American Chemical Society (ACS)
Date: 09-01-2013
DOI: 10.1021/OM301013W
Design and Performance of Rigid Nanosize Multimetallic Cartwheel Pincer Compounds as Lewis-Acid Catalysts
Publisher: American Chemical Society (ACS)
Date: 08-06-2001
DOI: 10.1021/OM0101689
Synthesis of Symmetrical Poly(pyridin-2-yl)Ethane Ligands
Publisher: CSIRO Publishing
Date: 1986
DOI: 10.1071/CH9861063
Abstract: Reaction of lithium derivatives of pyridin-2-ylmethanes, (C5H4N)CRR′- Li+, with mercury(II) iodide results in precipitation of mercury, and formation of symmetrical poly(pyridin-2-yl)ethanes [(C5H4N)CRR′]2 (R = H, R = Ph R = Me, R′ = Ph R = R′ = Me R = C5H4N, R′ = H R = C5H4N, R′ = Me). For [(C5H4N)CRPh]2 (R = H, Me) mixtures of the meso and racemic diastereoisomers were found. Two of the products, [(C5H4N)CHPh]2 and [(C5H4N)2CH]2, were obtained in high yield, and readily form palladium(II) acetate complexes, Pd(O2CMe)2{rac-[(C5H4N)CHPh]2} and [Pd(O2CMe)2]2[(C5H4N)2CH]2. The synthesis of 2-(1-phenylethyl)pyridine and a convenient route to bis(pyridin-2-yl)methane are described.
Vibrational spectra and structure of thiolatomercury(II) complexes
Publisher: Elsevier BV
Date: 1
Catalytic Dehydrogenation of Liquid Organic Hydrogen Carrier Model Compounds by CpM+ (M = Fe, Co, Ni) in the Gas Phase
Publisher: American Chemical Society (ACS)
Date: 09-12-2022
Concerted Oxidative Addition of Diaryliodine(III) Reagents to a Pincer-Palladium(II) Substrate: A Computational Analysis
Publisher: American Chemical Society (ACS)
Date: 14-07-2023
Dissecting transmetalation reactions at the molecular level: C–B versus F–B bond activation in phenyltrifluoroborate silver complexes
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0DT03309J
Abstract: Gas-phase experiments and computation provide fundamental model reactions for aryl and fluoride transfer between silver and boron centres.
Complexes of phenylmercury(II) with dicyandiamide
Publisher: Elsevier BV
Date: 1978
Structural Studies of RSHgII Complexes Containing (-Hg-SR-)n Rings and Chains
Publisher: CSIRO Publishing
Date: 1979
DOI: 10.1071/CH9790311
Abstract: Crystals of acetato(methanethiolato)-γ-picolinemercury(11), MeSHgO2CMe,C6H7N (I), are monoclinic, P21/a, a 16.617(9), b 7.271(3), c 20.476(2) � β 113.31(5)�, Z 8. The structure resembles that of its pyridine analogue, being based on a polymeric (-Hg-SMe-)n chain with acetate and picoline groups coordinated at each mercury a similar structure is found for EtSHgO2CMe,C5H5N (2), monoclinic, P21/c, a 9.344(2), b 17.917(9), c 7.179(2) �,β 106.24(3)�, Z 4. The structure of tetrachlorotetra(2-methylpropane-2-thiolato)di(γ-picoline) tetramercury(11), (BUtS)4Cl4Hg4(C6H7N)2 (3), also resembles that of its pyridine analogue being based on an unusual tetranuclear grouping of mercury atoms linked by chloride and thiolate bridges. Crystals of (3) are monoclinic, P21/c a 12.334(7), b 17.468(9), c 9.999(5) �, β 91.18(4)�, Z 2. Crystals of MeSHgBr (4) are monoclinic, P21/c, a 7.770(9), b 7.500(5), c 7.945(10) �, β 91.71(3)�, Z 4, and contain parallel chains (-Hg-SMe-)n with neighbouring chains linked by bridging bromine atoms into parallel sheets. Each bromine is triply bridging, being coordinated to two mercury atoms in one chain, and one mercury atom in an adjacent chain. The structure of MeSHgCl appears to be isomorphous.
Gas-Phase Ion–Molecule Reactions of Copper Hydride Anions [CuH2]− and [Cu2H3]−
Publisher: American Chemical Society (ACS)
Date: 10-02-2017
DOI: 10.1021/ACS.INORGCHEM.6B02145
Abstract: Gas-phase reactivity of the copper hydride anions [CuH
Lewis-Base Adducts of Group-11 Metal(I) Compounds. XXXI. Reaction of 2,6-Bis[1-phenyl-1-(pyridin-2-Yl)ethyl]pyridine (L), and Copper(I) Halides in Acetonitrile: Structural Characterization of Salts of the [(MeCN)Cu(meso-L)]+ Cation
Publisher: CSIRO Publishing
Date: 1987
DOI: 10.1071/CH9871881
Abstract: Reaction of 2,6-bis[l-phenyl-1-(pyridin-2-yl)ethyl]pyridine, L, with copper(1) chloride, bromide, and iodide in acetonitrile solution has been shown to yield salts, structurally characterized by single-crystal X-ray diffraction methods as [( MeCN ) CuL ]+ [ ClCuCl ]-, (1), [( MeCN ) CuL ]+2 [XCuX2CuX]2-, X = Br (2), I (3) (both isomorphous ), all as yellow needles, and a form of (3), orange blocks, as the hemiacetonitrile solvate, (4), [( MeCN ) CuL ]+2 [IcuI2Cul]2-. MeCN . The same cation is common to all four species, containing four-coordinate copper(r), with L as meso -tridentate ligand in (4), the most precisely defined ex le, Cu-N( MeCN ) is 1.919(5) �, the shortest copper(1) acetonitrile distance known, while Cu-N(L) are 2.065(5)-2.073(5) �. The reason for non-formation of species of the type [ LCuX ] appears to lie in the tridentate ligand conformation which permits coordination of acetonitrile but not larger halide species.
An electrospray mass spectrometric study of methylmercury(II) nitrogen base derivatives and their ligand exchange reactions
Publisher: Elsevier BV
Date: 1994
UV initiated formation of polymer monoliths in glass and polymer microreactors
Publisher: Elsevier BV
Date: 07-2011
Computational Study of Bridge Splitting, Aryl Halide Oxidative Addition to PtII, and Reductive Elimination from PtIV: Route to Pincer‐PtII Reagents with Chemical and Biological Applications
Publisher: Wiley
Date: 08-10-2021
Abstract: Density functional theory computation indicates that bridge splitting of [Pt II R 2 (μ‐SEt 2 )] 2 proceeds by partial dissociation to form R 2 Pt a (μ‐SEt 2 )Pt b R 2 (SEt 2 ), followed by coordination of N‐donor bromoarenes (L‐Br) at Pt a leading to release of Pt b R 2 (SEt 2 ), which reacts with a second molecule of L‐Br, providing two molecules of PtR 2 (SEt 2 )(L‐Br‐ N ). For R=4‐tolyl (Tol), L‐Br=2,6‐(pzCH 2 ) 2 C 6 H 3 Br (pz=pyrazol‐1‐yl) and 2,6‐(Me 2 NCH 2 ) 2 C 6 H 3 Br, subsequent oxidative addition assisted by intramolecular N‐donor coordination via Pt II Tol 2 (L‐ N,Br ) and reductive elimination from Pt IV intermediates gives mer ‐Pt II (L‐ N,C,N )Br and Tol 2 . The strong σ‐donor influence of Tol groups results in subtle differences in oxidative addition mechanisms when compared with related aryl halide oxidative addition to palladium(II) centres. For R=Me and L‐Br=2,6‐(pzCH 2 ) 2 C 6 H 3 Br, a stable Pt IV product, fac ‐Pt IV Me 2 {2,6‐(pzCH 2 ) 2 C 6 H 3 ‐ N,C,N )Br is predicted, as reported experimentally, acting as a model for undetected and unstable Pt IV Tol 2 {L‐ N,C,N }Br undergoing facile Tol 2 reductive elimination. The mechanisms reported herein enable the synthesis of Pt II pincer reagents with applications in materials and bio‐organometallic chemistry.
Mercury(II) and organomercury(II) complexes of thiols and dithiols, including british anti-lewisite
Publisher: Elsevier BV
Date: 1977
Metal-sulphur stretching frequencies and structures of complexes of zinc, cadmium, and mercury with thiols
Publisher: Elsevier BV
Date: 1976
Synthesis of the first organopalladium(IV) cations, including the first X-ray study of isostructural organopalladium(IV) and platinum(IV) complexes, [fac-MMe3{tris(pyrazol-1-yl)methane-N,N′,N′}]I
Publisher: Royal Society of Chemistry (RSC)
Date: 1987
DOI: 10.1039/C39870001093
Dissecting Transmetalation Reactions at the Molecular Level: Role of the Coordinated Anion in Gas-Phase Models for the Transmetalation Step of the Hiyama Cross-Coupling Reaction
Publisher: American Chemical Society (ACS)
Date: 09-06-2021
Three-coordinate mercury in (2,2′-bipyridyl)methylmercury(II) nitrate and related complexes
Publisher: Elsevier BV
Date: 04-1975
Structural, spectroscopic and angular-overlap studies of the nature of metal-ligand bonding for tripod ligands
Publisher: Royal Society of Chemistry (RSC)
Date: 1991
DOI: 10.1039/DT9910001981
Crystal structure of tetrakispentafluorophenyl-µ-bisdiphenylarsinomethane-dimercury(II), a three-co-ordinate mercury complex
Publisher: Royal Society of Chemistry (RSC)
Date: 1971
DOI: 10.1039/C29710000443
Organopalladium(IV) complexes containing phosphine ligands, and the structure of the platinum(IV) complex [PtMe3(bpy)(PPh3)][O3SCF3] (bpy=2,2′-bipyridine)
Publisher: Elsevier BV
Date: 02-2000
Synthesis and reactivity of (η1-Alkynyl)diorganoplatinum(IV) species, including structural studies of PtIMe(p-Tol)(C≡CSiMe 3)(dmpe) [dmpe = 1,2-bis(dimethylphosphino)ethane] and the platinum(II) reagent PtPh2(dmpe)
Publisher: American Chemical Society (ACS)
Date: 05-06-2008
DOI: 10.1021/OM800122K
Organomercury alkoxides. Vibrational spectra and structure of MeHgOPh and PhHgOR (R = Ph, Me, Et)
Publisher: Elsevier BV
Date: 1980
Entry to alkynylplatinum(IV) chemistry using hypervalent iodine(III) reagents, and the synthesis of triphenyl{4,4′-bis(tert-butyl)-2,2′-bipyridine}iodoplatinum(IV)
Publisher: Elsevier BV
Date: 11-2003
A 199Hg NMR spectroscopic study of two and three-coordinate methylmercury(II) complexes, [MeHgL]NO3
Publisher: Elsevier BV
Date: 1978
Organoruthenium clusters obtained from α-H4Ru4(CO)12
Publisher: Elsevier BV
Date: 10-1972
Coordination chemistry of methylmercury(II) with flexible tripod ligands containing pyridyl and N-methylimidazolyl groups, including the crystal structure of [bis(N-methylimidazol-2-yl)(pyridin-2-yl)methanol-N,N',N'']methylmercury(II) nitrate, [MeHg(py(N-MeIm)2COH)]NO3
Publisher: American Chemical Society (ACS)
Date: 11-1984
DOI: 10.1021/IC00191A032
Carbon-carbon and carbon-chlorine bond formation on reaction of iodine(III) reagents with the bis(alkynyl)palladium(II) motif, and structural chemistry of trans-Pd(C≡C-o-Tol)2(PMe2Ph)2] and trans-[PdCl(C≡C-o-Tol)(PMe2Ph)2]
Publisher: Elsevier BV
Date: 04-2011
Dimethylpalladium(II) and Monomethylpalladium(II) Reagents and Complexes
Publisher: Wiley
Date: 1998
Pallada(IV)cyclopentane chemistry, including the synthesis of tris(pyrazol-1-yl)borate complexes
Publisher: Elsevier BV
Date: 09-1992
An electrospray mass spectrometric and voltammetric study of horse heart cytochrome c in the presence of metal ions
Publisher: Elsevier BV
Date: 1998
An electrospray mass spectrometric study of organomercury(II) and mercuric interactions with peptides involving cysteinyl ligands
Publisher: SAGE Publications
Date: 1996
DOI: 10.1255/EJMS.59
Intramolecular coordination involving tripodal ‘N2 C−’ ligands, including structural analysis of complexes formed by oxidative addition of chlorobis- (1-pymzolyl)propanes to Dimethylplatinum(II)
Publisher: Elsevier BV
Date: 04-1986
Structural chemistry of dihalogenopalladium(II) and platinum(II) complexes of heteroleptic N,S- and N,Se-donor ligands based on the 2- organochalcogenomethylpyridine motif
Publisher: Elsevier BV
Date: 10-2011
Microtubule‐dependent processes precede pathological calcium influx in excitotoxin‐induced axon degeneration
Publisher: Wiley
Date: 05-12-2019
DOI: 10.1111/JNC.14909
Abstract: Axon degeneration and axonal loss is a feature of neurodegenerative disease and injury and occurs via programmed pathways that are distinct from cell death pathways. While the pathways of axonal loss following axon severing are well described, less is known about axonal loss following other neurodegenerative insults. Here we use primary mouse cortical neuron cultures grown in compartmentalized chambers to investigate the role of calcium in the degeneration of axons that occurs following a somal insult by the excitotoxin kainic acid. Calcium influx has been implicated in both excitotoxicity and axon degeneration mechanisms, however the link between a somal insult and axonal calcium increase is unclear. Live imaging of axons demonstrated that pharmacologically preventing intracellular calcium increases through the endoplasmic reticulum or mitochondria significantly (p < 0.05) reduced axon degeneration. Live calcium-imaging with the Ca
Modeling Metal-Catalyzed Polyethylene Depolymerization: [(Phen)Pd(X)]+ (X = H and CH3) Catalyze the Decomposition of Hexane into a Mixture of Alkenes via a Complex Reaction Network
Publisher: American Chemical Society (ACS)
Date: 09-02-2021
Two-Stage Catalysis in the Pd-Catalyzed Formation of 2,2,2-Trifluoroethyl-Substituted Acrylamides: Oxidative Alkylation of PdIIby an IIIIReagent and Roles for Acetate, Triflate, and Triflic Acid
Publisher: American Chemical Society (ACS)
Date: 21-01-2022
Nickel(II/IV) Manifold Enables Room-Temperature C(sp3)–H Functionalization
Publisher: American Chemical Society (ACS)
Date: 26-11-2019
DOI: 10.1021/JACS.9B11999
Abstract: This Article demonstrates a mild oxidatively induced C(sp
The preparation of adducts of diphenylmercury with bidentate ligands
Publisher: Elsevier BV
Date: 03-1969
Transition Metal Organometallic Synthesis Utilising Diorganoiodine(III) Reagents
Publisher: Elsevier
Date: 2007
Structural Chemistry of the Platinum Group Metals: the Palladacyclopentane Complex (Butane-1,4-diyl)(N,N,N',N'-tetramethylethylenediamine)palladium(II)
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/CH9942119
Abstract: A single-crystal X-ray structure determination of the reagent (butane-1,4-diyl)(N,N,N′,N′- tetramethylethylenediamine)palladium(II) has shown that crystals are orthorhombic, Pbca, a 15.832(3), b 14.128(9), c 11.451(3) Ǻ, Z 8. The square planar complex has puckered PdCH2CH2CH2CH2 and PdNMe2CH2CH2NMe2 rings in which the outer carbon atoms deviate by c. �0.35 Ǻ from the 'PdC2N2' mean plane.
Deprotonated 2-benzylpyridine as a bridging ligand. Synthesis and structure of the binuclear palladium(II) complex trans(N,N)-[Pd(μ-pyCHPh-N,CH)(γ-picoline)Cl]2·CH2Cl2
Publisher: Elsevier BV
Date: 08-1985
Relative σ donor ability of pyridines, imidazoles, and pyrazoles
Publisher: Elsevier BV
Date: 1981
Synthesis and isomerism of neutral and cationic dimethylplatinum(IV) complexes. Crystal structure of the bis(pyrazol-1-yl)(thien-2-yl)methane complex PtI2Me2{(pz)2(thi)CH-N,N′}
Publisher: Elsevier BV
Date: 10-1990
A new mechanistic pathway under Sonogashira reaction protocol involving multiple acetylene insertions
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C001109F
Abstract: An unreported product outcome from an intended Sonogashira coupling is presented. The generality of this finding has been demonstrated by screening of a range of pre-catalysts. Mechanistic studies are consistent with the tetra-aryl benzene product forming by interception of the aryl halide oxidative addition intermediate by repeated acetylene insertion.
Aryl–Fluoride Bond-Forming Reductive Elimination from Nickel(IV) Centers
Publisher: American Chemical Society (ACS)
Date: 13-08-2019
DOI: 10.1021/JACS.9B06896
Abstract: The treatment of pyridine- and pyrazole-ligated Ni
Synthesis of organopalladium(IV) complexes by halogen exchange, and the structure of the azidopalladium(II) complex formed on reductive elimination of ethane from Pd(N)3Me2(CH2Ph)(bpy)
Publisher: Elsevier BV
Date: 1991
Synthesis and structure of dichloropalladium(II) complexes of heteroleptic N,S- and N,Se-donor ligands based on the 2-organochalcogenomethylpyridine motif, and Mizoroki-Heck catalysis mediated by complexes of N,S-donor ligands
Publisher: Elsevier BV
Date: 2010
Experimental and Computational Studies of High-Valent Nickel and Palladium Complexes
Publisher: American Chemical Society (ACS)
Date: 10-10-2017
Theoretical Investigation into the Mechanism of Cyanomethylation of Aldehydes Catalyzed by a Nickel Pincer Complex in the Absence of Base Additives
Publisher: American Chemical Society (ACS)
Date: 12-2016
Dimethylmetal(III) pyrazolides
Publisher: Elsevier BV
Date: 11-1985
Heavy-metal-nucleoside interactions. 13. Synthesis and spectroscopic study of organomercury derivatives of guanosine and thymidine
Publisher: American Chemical Society (ACS)
Date: 02-1979
DOI: 10.1021/IC50192A044
Gas‐Phase Models for the Nickel‐ and Palladium‐Catalyzed Deoxygenation of Fatty Acids
Publisher: Wiley
Date: 11-09-2020
Organomercury compounds containing three-coordinate mercury. Synthesis and spectroscopic studies of cationic complexes of methylmercury(II) with neutral donor ligands
Publisher: American Chemical Society (ACS)
Date: 02-1976
DOI: 10.1021/IC50156A037
Proton NMR detection of cationic organopalladium(IV) intermediates in oxidative-addition reactions and the structure of fac-PdBrMe2(CH2COPh)(bpy)
Publisher: American Chemical Society (ACS)
Date: 09-1992
DOI: 10.1021/OM00045A023
Synthetic and X-ray structural studies of complexes formed by metallation of tri(1-pyrazolyl)methane by dimethylplatinum(II)
Publisher: Royal Society of Chemistry (RSC)
Date: 1983
DOI: 10.1039/DT9830001253
Synthesis of halogeno, pseudohalogeno, and carboxylatopalladium(IV) complexes by halogen exchange. Crystal structure of azido(2,2′-bipyridyl)- benzylpalladium(II), formed on reductive elimination of e
Publisher: Elsevier BV
Date: 07-1992
η1-Alkynyl Chemistry for the Higher Oxidation States of Palladium and Platinum
Publisher: Springer Berlin Heidelberg
Date: 2011
Anomalous Shape Evolution of Ag2O2 Nanocrystals Modulated by Surface Adsorbates during Electron Beam Etching
Publisher: American Chemical Society (ACS)
Date: 24-12-2018
DOI: 10.1021/ACS.NANOLETT.8B04719
Abstract: An understanding of nanocrystal shape evolution is significant for the design, synthesis, and applications of nanocrystals with surface-enhanced properties such as catalysis or plasmonics. Surface adsorbates that are selectively attached to certain facets may strongly affect the atomic pathways of nanocrystal shape development. However, it is a great challenge to directly observe such dynamic processes in situ with a high spatial resolution. Here, we report the anomalous shape evolution of Ag
Organopalladium and platinum chemistry in oxidising milieu as models for organic synthesis involving the higher oxidation states of palladium
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B914080H
Abstract: This perspective focuses on the higher oxidation state (III, IV) organometallic chemistry of palladium involving a range of strong oxidants, with consideration of platinum chemistry where it is informative for the evaluation of structure and mechanism. Particular emphasis is placed on hypervalent iodine reagents, halogens and related oxidants of intense current interest in organic synthesis, together with linkages in concepts between this chemistry and recent advances in studies of diaryl disulfides, diaryl diselenides, and diaryl peroxides as oxidants.
Weak intramolecular π coordination to methylmercury(II). Structure of (2-benzylpyridine)methylmercury(II) nitrate
Publisher: International Union of Crystallography (IUCr)
Date: 15-04-1980
Synthesis of Arylpalladium(II) Boronates: Confirming the Structure and Chemical Competence of Pre‐transmetalation Intermediates in the Suzuki–Miyaura Reaction
Publisher: Wiley
Date: 26-05-2021
Abstract: Palladium(II) boronates are recognized as fundamental pre‐transmetalation intermediates in Suzuki–Miyaura cross‐couplings. While these typically transient species have been detected and studied spectroscopically, it is conspicuous that they have never been isolated since this important reaction was discovered over forty years ago. This study reports the synthesis of a family of unprecedented arylpalladium(II) boronates that are, by design, kinetically stable at ambient temperature, both in solution and in the solid state. These properties enabled unambiguous crystallographic confirmation of their structure for the first time and their chemical competence in a Suzuki–Miyaura reaction was demonstrated.
Synthesis of Amidines by Palladium-Mediated CO2 Extrusion Followed by Insertion of Carbodiimides: Translating Mechanistic Studies to Develop a One-Pot Method
Publisher: American Chemical Society (ACS)
Date: 17-12-2018
Synthesis of 1,1-bis(pyrazol-1-ylmethyl)ethene and the structure of a trimethylplatinum(IV) derivative containing an eight-membered chelate ring
Publisher: Royal Society of Chemistry (RSC)
Date: 1992
DOI: 10.1039/DT9920002663
Near thermal, selective liberation of hydrogen from formic acid catalysed by copper hydride ate complexes
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2DT03764E
Abstract: Copper hydride ate complexes can effectively catalyse the selective decomposition of formic acid into carbon dioxide and hydrogen.
Higher Oxidation State Organopalladium and Platinum Chemistry
Publisher: Springer Berlin Heidelberg
Date: 2011
DFT studies of isomerization in palladium(IV) chemistry and alkyl halide transfer from palladium(IV) to palladium(II)
Publisher: Elsevier BV
Date: 10-2018
Organopalladium(IV) and platinum(IV) complexes containing the bis(pyrazol-1-yl)borate ligand. Structures of PtMe3{(pz)2BH2}(py) (py=pyridine) and Pt(mq)Me2{(pz)2BH2} (mq=8-methylquinolinyl) and detect
Publisher: Elsevier BV
Date: 2002
Organopalladium-Functionalized Dendrimers: Insertion of Palladium(0) into Peripheral Carbon−Iodine Bonds of Carbosilane Dendrimers Derived from Polyols. Crystal Structure of Si{(CH2)3
Publisher: American Chemical Society (ACS)
Date: 09-1997
DOI: 10.1021/OM970343E
Theoretical Study of the Mechanism of CO and Acetylene Migratory Insertions into Pt–Cp* Bonds
Publisher: American Chemical Society (ACS)
Date: 24-04-2014
DOI: 10.1021/OM500273X
Cracking and Dehydrogenation of Cyclohexane by [(phen)M(X)]+ (M = Ni, Pd, Pt; X = H, CH3) in the Gas Phase
Publisher: American Chemical Society (ACS)
Date: 23-09-2021
Organoplatinum(II) and -(IV) and organopalladium(II) and -(IV) complexes of a macrocyclic thioether: x-ray crystal structure of Pt(C6H5)2(9S3), an example of exodentate 1,4,7-trithiacyclononane (9S3)
Publisher: American Chemical Society (ACS)
Date: 05-1993
DOI: 10.1021/IC00062A013
The chemistry of polynuclear compounds. Part XXV. Some reactions of α-tetrahydridododecacarbonyltetraruthenium with cyclic olefins
Publisher: Royal Society of Chemistry (RSC)
Date: 1973
DOI: 10.1039/DT9730002056
Synthesis of pyridine ligands via transient organomercurials
Publisher: Elsevier BV
Date: 06-1985
Synthesis of ketones and methanols containing pyridinyl and N-methylimidazolyl groups
Publisher: CSIRO Publishing
Date: 1983
DOI: 10.1071/CH9830415
Abstract: N-Methylimidazolyllithium reacts with N-methylimidazole-2-carbaldehyde to form bis(N-methylimidazol-2-yl)methanol, and with the esters ethyl N-methylimidazole-2-carboxylate and ethyl pyridine-2-carboxylate to give bis(N-methylimidazol-2-yl)methanone,(mim)2CO, and (N-methyl- imidazol-2-yl)(pyridin-2-yl)methanone, (Py)(mim)CO, respectively. The ketones react with N-methylimidazolyllithium to give tris(N-methylimidazol-2-yl)methanol, (mim)3 COH, and bis(N- methylimidazol-2-yl)(pyridin-2-yl)methanol (Py)(mim)2 COH, respectively.
Formation of diphenylmercury from phenylmercury(II) amino-acid complexes
Publisher: CSIRO Publishing
Date: 1977
DOI: 10.1071/CH9770669
Abstract: The preparation and characterization of phenylmercury(II) complexes of L-cysteine and DL-penicillamine are reported. Infrared and Raman spectra of the new complex μ-cysteinato-S,N-bis[phenylmercury(n)] monohydrate and of previously reported complexes of L-cysteine and DL- penicillamine are compared. The complexes decompose to form diphenylmercury when stirred as suspensions in benzene at ambient temperature.
Structural study of a ruthenium hydride cluster by nematic-phase proton magnetic resonance
Publisher: American Chemical Society (ACS)
Date: 04-1973
DOI: 10.1021/JA00789A080
π-Bonded alkene and arene complexes of silver(I): an electrospray mass spectrometric study
Publisher: Elsevier BV
Date: 06-1994
Synthesis and study of the benzyl- and naphthylpalladium(IV) complexes PdBrMe2(CH2Ar)(L2) (L2 = bpy, phen) and .mu.-hydrocarbyl palladium(IV)-palladium(IV) and palladium(IV)-platinum(IV) complexes and
Publisher: American Chemical Society (ACS)
Date: 12-1990
DOI: 10.1021/OM00162A020
Synthesis and structural studies of dimethylindium(III) complexes with polydentate nitrogen donor ligands, and of monomethylindium(III) complexes containing alkoxide-bridged binuclear cations
Publisher: Royal Society of Chemistry (RSC)
Date: 1988
DOI: 10.1039/DT9880000035
Synthesis of Arylpalladium(II) Boronates: Confirming the Structure and Chemical Competence of Pre-transmetalation Intermediates in the Suzuki–Miyaura Reaction
Publisher: Wiley
Date: 26-05-2021
Abstract: Palladium(II) boronates are recognized as fundamental pre‐transmetalation intermediates in Suzuki–Miyaura cross‐couplings. While these typically transient species have been detected and studied spectroscopically, it is conspicuous that they have never been isolated since this important reaction was discovered over forty years ago. This study reports the synthesis of a family of unprecedented arylpalladium(II) boronates that are, by design, kinetically stable at ambient temperature, both in solution and in the solid state. These properties enabled unambiguous crystallographic confirmation of their structure for the first time and their chemical competence in a Suzuki–Miyaura reaction was demonstrated.
Coordination chemistry of methylmercury(II). Complexes of aromatic nitrogen donor tripod ligands involving new coordination geometries for methylmercury(II)
Publisher: American Chemical Society (ACS)
Date: 12-1981
DOI: 10.1021/IC50226A052
Oxidation of Complexes by (O2CPh)2 and (ER)2 (E = S, Se), Including Structures of Pd(CH2CH2CH2CH2)(SePh)2(bpy) (
Publisher: American Chemical Society (ACS)
Date: 24-07-1998
DOI: 10.1021/IC9715005
Abstract: Oxidation of PdMe(2)(L(2)) [L(2) = 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen)] by diphenyl diselenide provides the first ex les of stable dimethylpalladium(IV) complexes PdMe(2)(SePh)(2)(L(2)), and pallada(IV)cyclic may be similarly isolated. X-ray structural studies of the octahedral dimethylpalladium(IV) complexes and their isomorphous platinum(IV) analogues have been completed [L(2) = bpy, orthorhombic Pnma L(2) = phen, triclinic P&onemacr an additional phase for PtMe(2)(SePh)(2)(phen), tetragonal, I4(1)/a]. The complexes PdMe(2)(SePh)(2)(L(2)) decompose at moderate temperatures in CDCl(3) following first-order behavior [L(2) = bpy, E(a) approximately 46 kJ mol(-)(1), DeltaS()(20 degrees C) approximately -170 J K(-)(1) mol(-)(1) L(2) = phen, E(a) approximately 36 kJ mol(-)(1), DeltaS()(20 degrees C) approximately -204 J K(-)(1) mol(-)(1)] to give ethane and Se(Ph)Me, together with small quantities of SePh(2). Similar C.C, C.O, C.S, and C.Se bond formation processes occur on decomposition of palladium(IV) species that are too unstable to be isolated on the oxidation of PdMe(2)(bpy) or by (O(2)CPh)(2) or (SPh)(2).
A Two-Step Catalytic Cycle for the Acceptorless Dehydrogenation of Ethane by Group 10 Metal Complexes: Role of the Metal in Reactivity and Selectivity
Publisher: American Chemical Society (ACS)
Date: 13-11-2020
Octanol/water partition coefficients as a model system for assessing antidotes for methylmercury(ii) poisoning, and for studying mercurials with medicinal applications
Publisher: Elsevier BV
Date: 09-1984
DOI: 10.1016/0162-0134(84)85064-3
Abstract: 1-Octanol/water partition coefficients, [HgII]octanol/[HgII]water, provide a simple but limited model system for aspects of the biological behavior of methylmercury(II) and commonly used organomercury(II) medicinal compounds. In an octanol/water system some widely studied antidotes for mercury poisoning at least partly displace the biological thiols L-cysteine and glutathione from binding to MeHgII at pH 6.9. Addition of the antidote meso-dimercaptosuccinic acid to MeHgII in the presence of glutathione results in formation of metallic mercury. For RHgII derivatives of L-cysteine and glutathione, octanol/water partition coefficients follow the order Ph greater than Et greater than Me. An exceptionally high value for diphenylmercury, compared with PhHgII derivatives of L-cysteine and glutathione, is consistent with reported results of the distribution of mercury compounds in rats. Ethylmercury(II) is partly displaced from thimerosal by L-cysteine and glutathione in the octanol/water system, indicating that the active form of thimerosal in vivo may involve binding of EtHgII to biological ligands.
Synthesis and spectroscopic studies of RSHgII complexes, including complexes of ButSHgX (X = Cl, Br) and RSHgO2CMe (R = Me, Et) with pyridine
Publisher: CSIRO Publishing
Date: 1978
DOI: 10.1071/CH9780671
Abstract: The complexes RSHgX (R = Et, But X = Cl, Br) may be prepared by reaction of the alkanethiol with HgX2 in ethanol, and the 2- methylpropane-2-thiolates crystallize from pyridine as (ButSHgCl)2-C5H5N and ButSHgBr,C5H5N. The complexes RSHgO2CMe (R = Me, Et) may be prepared by reaction of mercuric acetate with Hg(SR)2 in water, and form crystalline RSHgO2CMe,C5H5N when dissolved in pyridine. Infrared and Raman spectra indicate coordination of pyridine in the pyridinates. Mercury-sulfur stretching vibrations of RSHgO2CMe (R = Me, Et, Pr, Bu) are discussed.
Synthesis of the stable organopalladium(IV) complexes [fac-PdRMe2(tripod)]X and selective reductive elimination of ethane from (.eta.1-allyl)palladium(IV) complexes to form (.eta.3-allyl)palladium(II) complexes
Publisher: American Chemical Society (ACS)
Date: 04-1990
DOI: 10.1021/OM00118A052
Synthesis, spectroscopic, and X-say structural characterization of methylmercury-? , ? -selenocysteinate monohydrate, a key model for the methylmercury(II)-selenoprotein interaction
Publisher: Elsevier BV
Date: 07-1983
Crystal Structure of Methyl[tetrakis(pyrazol-1-yl)borato-N,N']mercury(II)
Publisher: CSIRO Publishing
Date: 1987
DOI: 10.1071/CH9871609
Abstract: Crystals of methyl[tetrakis(pyrazol-l-yl)borato-N,N']mercury(II) [MeHg(B(pz)4}] are triclinic, Pi, a 12.73(2), b 8.88(1), c 8.10(1) �, α 109.80(8), β 99.16(9), γ 103.05(10)�, Z 2. The structure, determined by single-crystal X-ray methods (R 0.12 for 1598 'observed' reflections), has molecules of MeHg(B(pz)4} with two pz groups coordinated to mercury, giving planar but irregular coordination. The more strongly bound group has Hg-N 2.07(4) A with C-Hg-N 169(2)�, and the other group has Hg-N 2.65(4)� with C-Hg-N 112(1)�.
Identification of the Side Products That Diminish the Yields of the Monoamidated Product in Metal-Catalyzed C–H Amidation of 2-Phenylpyridine with Arylisocyanates
Publisher: American Chemical Society (ACS)
Date: 23-01-2020
Abstract: The Ru(II)-catalyzed amidation of 2-arylpyridines with aryl isocyanates via C-H bond activation is less efficient than described previously, due to the formation of a series of side products, which were readily identified using direct infusion electrospray mass spectrometry and high-performance liquid chromatography-mass spectrometry.
Neopentyl- and trimethylsilylmethylpalladium chemistry: synthesis of reagents for organopalladium chemistry and the crystal structure of the neopentyl(phenyl)palladium(IV) complex [Pd(mq)(CH2CMe3)Ph(b
Publisher: Elsevier BV
Date: 10-2002
Interaction of MeSHgO2CMe with imidazole and related ligands
Publisher: Elsevier BV
Date: 1978
Crystal and molecular structure of polymeric MeSHgO2CMe and MeSHgO2CMe,C5H5N and the tetranuclear complex (ButS)4Cl4Hg4(C5H5N)2
Publisher: CSIRO Publishing
Date: 1978
DOI: 10.1071/CH9780677
Abstract: Crystals of methanethiolatomercury(II) acetate are monoclinic, P 21/c, with a 5.292(2), b 15.912(7), c 7.086(2) Ǻ, β 92.96(3)°, Z 4, and its pyridine complex MeSHgO2CMe,C5H5N is monoclinic, P21/n, with a 10.093(3), b 7.026(2), c 15.350(5) Ǻ, β 105.01(3)°, Z4. Both structures are based on a polymeric chain (-Hg-SMe-)n with coordinated acetate groups. In MeSHgO2CMe the chains are linked into sheets by bridging acetate groups, and in the pyridine complex the chains are isolated with pyridine and acetate coordination at each mercury. Crystals of (ButS)4Cl4Hg4(C5H5N)2 are triclinic, Pī, with a 14.399(6), b 9.893(6), c 9.597(5) Ǻ, α 121.82(1), β 102.52(4), γ 102.94(4)°, and Z 1. The structure is based on a tetranuclear grouping of mercury atoms bridged by chloride and thiolate species and centrosymmetric about the origin. There are two mercury environments 'Hg(μ-SBut)2ClN' and 'Hg(μ-SBut)2(μ-Cl)2' with the dichloro bridge linking two equivalent mercury atoms on opposite sides of an (-Hg-SBut-)4 ring.
Trimethyl-palladium(IV) and -platinum(IV) complexes containing phosphine donor ligands, including studies of 1,5,9-triethyl-1,5,9-triphosphacyclodecane and X-ray structural studies of palladium(II) an
Publisher: Royal Society of Chemistry (RSC)
Date: 2000
DOI: 10.1039/B004741O
Palladium-mediated CO2 extrusion followed by insertion of ketenes: translating mechanistic studies to develop a one-pot method for the synthesis of ketones
Publisher: CSIRO Publishing
Date: 2023
DOI: 10.1071/CH23026
Formation of Ethane from Mono-Methyl Palladium(II) Complexes
Publisher: American Chemical Society (ACS)
Date: 02-06-2014
DOI: 10.1021/JA412338K
Abstract: This article describes the high-yielding and selective oxidatively induced formation of ethane from mono-methyl palladium complexes. Mechanistic details of this reaction have been explored via both experiment and computation. On the basis of these studies, a mechanism involving methyl group transmetalation between Pd(II) and Pd(IV) interediates is proposed.
Formation and reactions of the 1, 8-naphthyridine (napy) ligated geminally dimetallated phenyl complexes [(napy)Cu2(Ph)]+, [(napy)Ag2(Ph)]+ and [(napy)CuAg(Ph)]+
Publisher: SAGE Publications
Date: 02-2019
Abstract: Gas-phase ion trap mass spectrometry experiments and density functional theory calculations have been used to examine the routes to the formation of the 1,8-naphthyridine (napy) ligated geminally dimetallated phenyl complexes [(napy)Cu 2 (Ph)] + , [(napy)Ag 2 (Ph)] + and [(napy)CuAg(Ph)] + via extrusion of CO 2 or SO 2 under collision-induced dissociation conditions from their corresponding precursor complexes [(napy)Cu 2 (O 2 CPh)] + , [(napy)Ag 2 (O 2 CPh)] + , [(napy)CuAg(O 2 CPh)] + and [(napy)Cu 2 (O 2 SPh)] + , [(napy)Ag 2 (O 2 SPh)] + , [(napy)CuAg(O 2 SPh)] + . Desulfination was found to be more facile than decarboxylation. Density functional theory calculations reveal that extrusion proceeds via two transition states: TS1 enables isomerization of the O, O-bridged benzoate to its O-bound form TS2 involves extrusion of CO 2 or SO 2 with the concomitant formation of the organometallic cation and has the highest barrier. Of all the organometallic cations, only [(napy)Cu 2 (Ph)] + reacts with water via hydrolysis to give [(napy)Cu 2 (OH)] + , consistent with density functional theory calculations which show that hydrolysis proceeds via the initial formation of the adduct [(napy)Cu 2 (Ph)(H 2 O)] + which then proceeds via TS3 in which the coordinated H 2 O is deprotonated by the coordinated phenyl anion to give the product complex [(napy)Cu 2 (OH)(C 6 H 6 )] + , which then loses benzene.
Carbon−Oxygen Bond Formation at Metal(IV) Centers: Reactivity of Palladium(II) and Platinum(II) Complexes of the [2,6-(Dimethylaminomethyl)phenyl-N,C,N]- (Pincer) Liga
Publisher: American Chemical Society (ACS)
Date: 07-10-2004
DOI: 10.1021/OM040061W
Co-ordination chemistry of pyridyl and N-methylimidazolyl ketones. Synthetic and X-ray structural studies of copper(II), nickel(II), and dimethylgold(III) complexes
Publisher: Royal Society of Chemistry (RSC)
Date: 1985
DOI: 10.1039/DT9850000981
The synthesis of tripodal nitrogen donor ligands and their characterization as PdIIMe2 and PdIIIMe derivatives
Publisher: Elsevier BV
Date: 03-1990
Coordination complexes and organometallic complexes of palladium and platinum with polydentate ligands containing pyrazole groups and related ligands: an electrospray mass spectrometric study
Publisher: Elsevier BV
Date: 08-1993
Electron Delocalization in Spectroelectrochemically and Computationally Characterized [Pt{(p-BrC6F4)NCH═C(Cl)NEt2}Cl(py)]+ Formed by Electrochemical
Publisher: American Chemical Society (ACS)
Date: 12-2021
Methylmercury(II) derivatives of Pyridine-2(1H)-thione
Publisher: CSIRO Publishing
Date: 1976
DOI: 10.1071/CH9761383
Abstract: Methylmercuric nitrate reacts with pyridine-2(lH)-thione (C5H5NS) in acetone to give methyl-(pyridine-2(1H)-thione)mercury(11) nitrate, [MeHg(C5H5NS)] NO3. This complex reacts with sodium bicarbonate in acetone to give methyl(pyridine-2-thiolato)mercury(11), MeHg(C5H4NS).Infrared, Raman, and nuclear magnetic resonance spectra indicate that MeHgH is bonded to sulphur in both complexes, and that protonation of nitrogen occurs on reaction of MeHg(CsH,NS) with nitric acid to give [MeHg(C5H5NS)] NO3.
Organoplatinum(IV) and Palladium(IV) Complexes Containing Intramolecular Coordination Systems Based on the 8-Methylquinolinyl Group (mq), Including Structures of the Cation [Pt(mq)Me2(bpy)]
Publisher: American Chemical Society (ACS)
Date: 17-06-1999
DOI: 10.1021/OM990130K
Synthesis and decomposition of neutral palladium(IV) complexes containing fac-PdMe2R groups, including reductive elimination by η1-propenylpalladium(IV) complexes to form η3-propenylpalladium(II) spec
Publisher: Elsevier BV
Date: 07-1990
Organometallic compounds containing a guanidinium group. Phenylmercury(II) derivatives of creatine and creatinine
Publisher: American Chemical Society (ACS)
Date: 06-1978
DOI: 10.1021/IC50184A015
Studies of oxidative addition-reductive elimination reactions, and the crystal structure of the palladium(IV) complex Me2(p-BrC6H4CH2)Pd(phen)Br
Publisher: Elsevier BV
Date: 05-1989
Routes for the gas-phase total synthesis of dihydroxy magnesium carboxylate anions, [(RCO2)Mg(OH)2]–(R = CH3 and CH3(CH2)14)
Publisher: Elsevier BV
Date: 02-2019
Supported palladium catalysis using a heteroleptic 2-methylthiomethylpyridine-N,S-donor motif for Mizoroki-Heck and Suzuki-Miyaura coupling, including continuous organic monolith in capillary microscale flow-through mode
Publisher: Elsevier BV
Date: 09-2009
Computational study of selectivity in the [PtIICl4]2--catalysed arylation of arenes by diaryliodonium reagents: Arene activation at PtIV centres
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT03602G
Abstract: The mechanism for the [Pt II Cl 4 ] 2− -catalysed reaction of Ph 2 I III (TFA) (TFA = trifluoroacetate) with naphthalene (NapH) to give β-phenylation over α-phenylation of naphthalene has been examined by computational methods.
Co-ordination chemistry of dimethylgold(III). Synthesis, structural studies, and fluxional behaviour of complexes with polydentate ligands
Publisher: Royal Society of Chemistry (RSC)
Date: 1985
DOI: 10.1039/DT9850001183
Synthesis and structural studies of tripodal and planar [N-C-N]− intramolecular coordination systems involving pyrazole donor groups, including oxidative addition of an aryl-bromine bond to platinum(I
Publisher: Elsevier BV
Date: 06-1990
Coordination chemistry of methylmercury(II). Synthesis, hydrogen-1 NMR, and crystallographic studies of cationic complexes of MeHg(II) with ambidentate and polydentate ligands containing pyridyl and N-substituted imidazolyl donors and involving unusual coordination geometries
Publisher: American Chemical Society (ACS)
Date: 08-1981
DOI: 10.1021/IC50222A011
Formation of dimeric mercury(II) thiolate ions in water
Publisher: Elsevier BV
Date: 1977
Reduction of a platinum(iv ) prodrug model by sulfur containing biological reductants: computational mechanistic elucidation
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC05682J
Abstract: In order for the usual l -Cys zwitterion to reduce Pt IV , it is first required to tautomerise into its unusual form.
Convenient synthetic routes to MePdII, Me2PdII, and Me3PdIV complexes. The crystal structure of the MePdII complex [MePd(2,2′-bipyridyl)(γ-picoline)]BF4
Publisher: Elsevier BV
Date: 12-1987
Structural studies of complexes containing cycloplatinated tris(pyrazol-1-yl)methane
Publisher: Elsevier BV
Date: 06-1992
Pretransmetalation Intermediates in Suzuki-Miyaura C-C and Carbonylative Cross-Couplings: Synthesis and Structural Authentication of Aryl- and Aroylnickel(II) Boronates
Publisher: American Chemical Society (ACS)
Date: 17-02-2023
Suzuki-Miyaura Csp2-Csp2Cross-Couplings Employing Nickel(II) Pincer Precatalysts: Mechanistic Investigations
Publisher: American Chemical Society (ACS)
Date: 14-04-2021
Platinum–Tin Bonded Complexes, Including a Structural Analysis of the Octahedral Tris(pyrazol-1-yl)borate Complex Pt(SnMe3)Me2{(pz)3BH-N,N',N}
Publisher: CSIRO Publishing
Date: 1999
DOI: 10.1071/CH98166
Abstract: The platinum(II) complex K[PtMe2 {(pz)3BH-N,N′}] reacts with SnCl2Me2 to form Pt(SnClMe2)Me2- {(pz)3BH-N,N′ ,N″} ([(pz)3BH]–=tris(pyrazol-1-yl)borate). The closely related complex Pt(SnMe3)Me2- { (pz)3BH-N,N′ ,N″ } has distorted octahedral geometry for platinum with Pt–Sn 2·5727(8) Å . The Pt–N distance trans to the SnMe3 group [2·237(7) Å] is longer than those trans to the Me groups [2·127(7) and 2·131(6) Å], indicating for the trimethylstannyl group a trans influence which is higher than that for the methyl group.
Synthesis, spectroscopic, and structural studies of dimethylthallium(III) complexes containing heterocyclic nitrogen-donor ligands, including ‘TIC2N3O2’ and ‘TIC2O6’ geometries
Publisher: Royal Society of Chemistry (RSC)
Date: 1986
DOI: 10.1039/DT9860000939
Organomercury medicinal chemistry. Synthesis and structure of a (β-methoxyethyl)mercury(II) derivative of N(7)-deprotonated theophylline, [Hg(C3H7O)(C7H7N4O2)]
Publisher: International Union of Crystallography (IUCr)
Date: 15-09-1984
Synthesis and structure of methylmercury(II) complexes of 9-methylguanine, including the X-ray structural analysis of (9-methylguanine)-methylmercury(II) nitrate
Publisher: Royal Society of Chemistry (RSC)
Date: 1980
DOI: 10.1039/DT9800001693
Palladium-Mediated CO2 Extrusion Followed by Insertion of Allenes: Translating Mechanistic Studies to Develop a One-Pot Method for the Synthesis of Alkenes
Publisher: American Chemical Society (ACS)
Date: 20-06-2022
Methylmercury(II) selenolates. synthesis and characterization of MeHgSeMe and MeHgSePh, and 1H and 199Hg nmr studies of ligand exchange in MeHg(II) thiolates and selenolates, including amino acid complexes
Publisher: Elsevier BV
Date: 10-1983
Synthesis and Characterization of Ambient Temperature Stable Organopalladium(IV) Complexes, Including Aryl-, .eta.1-Allyl-, Ethylpalladium(IV), and Pallada(IV)cyclopentane Complexes. Structures of the
Publisher: American Chemical Society (ACS)
Date: 1995
DOI: 10.1021/OM00001A031
Synthetic and Structural Studies of Binuclear Organopalladium(II) Complexes Including a Bis(pyridin-2-yl)phenylmethyl Complex With Four- and Eight-Membered Palladocycle Rings, trans(N,N)-(Pd(μ-Py2PhC-N,N',C')Cl)2.½CH2Cl2.½Me2CO
Publisher: CSIRO Publishing
Date: 1988
DOI: 10.1071/CH9880651
Abstract: The byridin-2-yl) phenylchloromethanes PyPh2CCl and Py2PhCCl undergo oxidative addition reactions with bis ( dibenzylideneacetone )palladium(0) to form {Pd(PyPh2C) Cl }2 (1) and {Pd(Py2PhC)C}2.�2CH2Cl2.�Me2CO (2), respectively. n.m.r , studies of (1) in CDCl3 indicate presence of an equilibrium between two isomers, involving the ligand (pyridin-2-yl ) diphenylmethyl in η3-coordination, {Pd(η3-PyPh2C)(μ- Cl )}2. Complex (2) has two bis (pyridin-2-yl) phenylmethyl groups present as bridging N,C′- ligands , with the groups also N,C- bidentate to each palladium, to form a binuclear compex containing four- and eight- membered palladocycles: PdC(CN)CNPdC(CN)CNBoth palladium(II) centres in (2) have square-planar 'trans-PdCN2Cl' coordination, so that (2) may be represented as trans(N,N)-{Pd(μ- Py2PhC-N,N′, C′) Cl }2.�CH2Cl2.�Me2CO. A complex similar to (2), trans(N,N)-{Pd(μ- PyPhCH -N,C?)( γmpy ) Cl }2.CH2Cl2 (3), forms on reaction of the lithium derivative of 2-benzylpyridine, Li( PyPhCH ), with dichlorobis (4-methylpyridine)palladium(II) (3) reacts with excess 2-benzylpyridine with displacement of γmpy to form trans(N,N)-{Pd(μ- PyPhCH -N,C?)(PyPhCH2) Cl }2 (4). In developing an alternative isolation procedure for (3), involving column chromatography with 4% ethyl acetate in chloroform, the coordination complex trans- bis{1-phenyl-1-(pyridin-2-yl)prop-1-en-2-olato-O,N}palladium(II), Pd{( PyPhC )C(Me)O}2 (5), was isolated in low yield. X-Ray structural studies of (2)-(5) have been completed, with all four complexes crystallizing in the monoclinic system (2): space group P21/c, a 9.649(6), b 21.116(9), c 18.627(7)Ǻ,β 111.42(4)°, Z 4 (3): P21/c, a 13.967(2), b 13.996(3), c 18.886(2)Ǻ, β 98.74(1)°, Z 4 (4): P21/n, a 14.274(9), b 14.584(14), c 20.97(2)Ǻ, β 109.18(5)°, Z 4 (5): P21/c, a 15.184(3), b 7.887(6), c 19.240(2)Ǻ, β 97.51(1)°, Z 4.
Synthetic and structural studies of methyl- and phenylpalladium(II) complexes of poly(pyrazol-1-yl) borates, and the η3-allylpalladium(II) complex Pd(η3-C3H5){(pz)3BH-N,N′}
Publisher: Elsevier BV
Date: 03-1995
Metallation of tris(1-pyrazolyl)methane by dimethylplatinum(II)
Publisher: Elsevier BV
Date: 02-1982
Organometallic Chemistry of Palladium and Platinum with Poly(pyrazol-1-yl)alkanes and Poly(pyrazol-1-yl)borates
Publisher: Elsevier
Date: 1992
Palladium-mediated organic synthesis using porous polymer monolith formed in situ as a continuous catalyst support structure for application in microfluidic devices
Publisher: Elsevier BV
Date: 02-2009
Synthesis of the tridentate pyridine donor 2,6-bis[1-phenyl-1-(pyridin-2-yl)ethyl]pyridine (L), including separation of meso and rac diastereoisomers via methylmercury(II) derivatives, and an X-ray structural study of [HgMe(meso-L)]NO3·2H2O
Publisher: Royal Society of Chemistry (RSC)
Date: 1986
DOI: 10.1039/DT9860002201
Interaction of palladium(II) acetate with substituted pyridines, including a cyclometallation reaction and the structure of [Pd{meso-[(py)PhMeC]2C5H3N}(O2CMe)][O2CMe]·3H2O
Publisher: Royal Society of Chemistry (RSC)
Date: 1986
DOI: 10.1039/DT9860002205
Synthesis of H3Ru3(CO)9CCH3, a ruthenium ethylidyne complex
Publisher: Royal Society of Chemistry (RSC)
Date: 1972
DOI: 10.1039/C39720001331
Role of Silver Salts in Palladium-Catalyzed Arene and Heteroarene C–H Functionalization Reactions
Publisher: American Chemical Society (ACS)
Date: 07-2016
CH activation at the 3-position of pentane chains to form [NC(sp3)N]− complexes incorporating six-membered pallada(II)cyclic rings and pyridine, pyrazole and N-methylimidazole donor groups. Structu
Publisher: Elsevier BV
Date: 08-2000
Ligand-induced decarbonylation in diphosphine-ligated palladium acetates [CH3CO2Pd((PR2)2CH2)]+ (R = Me and Ph)
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CC08944A
Abstract: Isotope labelling, IR spectroscopy and DFT calculations reveal a novel ligand-induced decarbonylation reaction.
Organopalladium(IV) chemistry: binuclear PdIVPdIV and PdIVPtIV μ-hydrocarbyl complexes
Publisher: Elsevier BV
Date: 12-1988
Selectivity in reductive elimination and organohalide transfer from methyl(aryl) benzylpalladium(IV) complexes of bidentate nitrogen donor ligands, PdBrMe(Ar)(CH2Ph)(L2)
Publisher: Elsevier BV
Date: 04-1997
Synthetic and computational studies of the palladium(iv) system Pd(alkyl)(aryl)(alkynyl)(bidentate)(triflate) exhibiting selectivity in C-C reductive elimination
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2DT31086D
Abstract: Synthetic routes to methyl(aryl)alkynylpalladium(IV) motifs are presented, together with studies of selectivity in carbon-carbon coupling by reductive elimination from Pd(IV) centres. The iodonium reagents IPh(C≡CR)(OTf) (R = SiMe(3), Bu(t), OTf = O(3)SCF(3)) oxidise Pd(II)Me(p-Tol)(L(2)) (1-3) [L(2) = 1,2-bis(dimethylphosphino)ethane (dmpe) (1), 2,2'-bipyridine (bpy) (2), 1,10-phenanthroline (phen) (3)] in acetone-d(6) or toluene-d(9) at -80 °C to form complexes Pd(IV)(OTf)Me(p-Tol)(C≡CR)(L(2)) [R = SiMe(3), L(2) = dmpe (4), bpy (5), phen (6) R = Bu(t), L(2) = dmpe (7), bpy (8), phen (9)] which reductively eliminate predominantly (>90%) p-Tol-C≡CR above ~-50 °C. NMR spectra show that isomeric mixtures are present for the Pd(IV) complexes: three for dmpe complexes (4, 7), and two for bpy and phen complexes (5, 6, 8, 9), with reversible reduction in the number of isomers to two occurring between -80 °C and -60 °C observed for the dmpe complex 4 in toluene-d(8). Kinetic data for reductive elimination from Pd(IV)(OTf)Me(p-Tol)(C≡CSiMe(3))(dmpe) (4) yield similar activation parameters in acetone-d(6) (66 ± 2 kJ mol(-1), ΔH(‡) 64 ± 2 kJ mol(-1), ΔS(‡)-67 ± 2 J K(-1) mol(-1)) and toluene-d(8) (E(a) 68 ± 3 kJ mol(-1), ΔH(‡) 66 ± 3 kJ mol(-1), ΔS(‡)-74 ± 3 J K(-1) mol(-1)). The reaction rate in acetone-d(6) is unaffected by addition of sodium triflate, indicative of reductive elimination without prior dissociation of triflate. DFT computational studies at the B97-D level show that the energy difference between the three isomers of 4 is small (12.6 kJ mol(-1)), and is similar to the energy difference encompassing the six potential transition state structures from these isomers leading to three feasible C-C coupling products (13.0 kJ mol(-1)). The calculations are supportive of reductive elimination occurring directly from two of the three NMR observed isomers of 4, involving lower activation energies to form p-TolC≡CSiMe(3) and earlier transition states than for other products, and involving coupling of carbon atoms with higher s character of σ-bonds (sp(2) for p-Tol, sp for C≡C-SiMe(3)) to form the product with the strongest C-C bond energy of the potential coupling products. Reductive elimination occurs predominantly from the isomer with Me(3)SiC≡C trans to OTf. Crystal structure analyses are presented for Pd(II)Me(p-Tol)(dmpe) (1), Pd(II)Me(p-Tol)(bpy) (2), and the acetonyl complex Pd(II)Me(CH(2)COMe)(bpy) (11).
Enhanced synthesis of oxo-verdazyl radicals bearing sterically-and electronically-diverse C3-substituents
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1OB01946E
Abstract: Gram-scale synthesis of functionalised aryl substituted tetrazinanones for phosgene- and hydrazine-free preparation of 6-oxo-verdazyls.
Triruthenium and triosmium carbonium derivatives
Publisher: Royal Society of Chemistry (RSC)
Date: 1974
DOI: 10.1039/C39740000807
Ion-pairs as a gateway to transmetalation: aryl transfer from boron to nickel and magnesium
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2DT00746K
Abstract: Ion-ion reactions provide access to ion-pairs allowing their role in transmetalation reactions to be explored.
British anti-Lewisite and organomercury poisoning
Publisher: Springer Science and Business Media LLC
Date: 1975
DOI: 10.1038/253123A0
Theoretical investigation into the mechanism of reductive elimination from bimetallic palladium complexes
Publisher: American Chemical Society (ACS)
Date: 14-06-2011
DOI: 10.1021/IC102323S
Abstract: Reductive elimination of C-Cl and C-C bonds from binuclear organopalladium complexes containing Pd-Pd bonds with overall formal oxidation state +III are explored by density functional theory for dichloromethane and acetonitrile solvent environments. An X-ray crystallographically authenticated neutral complex, [(L-C,N)ClPd(μ-O(2)CMe)](2) (L = benzo[h]quinolinyl) (I), is examined for C-Cl coupling, and the proposed cation, [(L-C,N)PhPd(1)(μ-O(2)CMe)(2)Pd(2)(L-C,N)](+) (II), examined for C-C coupling together with (L-C,N)PhPd(1)(μ-O(2)CMe)(2)Pd(2)Cl(L-C,N) (III) as a neutral analogue of II. In both polar and nonpolar solvents, reaction from III via chloride dissociation from Pd(2) to form II is predicted to be favored. Cation II undergoes Ph-C coupling at Pd(1) with concomitant Pd(1)-Pd(2) lengthening and shortening of the Pd(1)-O bond trans to the carbon atom of L natural bond orbital analysis indicates that reductive coupling from II involves depopulation of the d(x(2)-y(2)) orbital of Pd(1) and population of the d(z(2)) orbitals of Pd(1) and Pd(2) as the Pd-Pd bond lengthens. Calculations for the symmetrical dichloro complex I indicate that a similar dissociative pathway for C-Cl coupling is competitive with a direct (nondissociative) pathway in acetonitrile, but the direct pathway is favored in dichloromethane. In contrast to the dissociative mechanism, direct coupling for I involves population of the d(x(2)-y(2)) orbital of Pd(1) with Pd(1)-O(1) lengthening, significantly less population occurs for the d(z(2)) orbital of Pd(1) than for the dissociative pathway, and d(z(2)) at Pd(2) is only marginally populated resulting in an intermediate that is formally a Pd(1)(I)-Pd(2)(III) species, (L-Cl-N,Cl)Pd(1)(μ-O(2)CMe)Pd(2)Cl(O(2)CMe)(L-C,N) that releases chloride from Pd(2) with loss of Pd(I)-Pd(III) bonding to form a Pd(II) species. A similar process is formulated for the less competitive direct pathway for C-C coupling from III, in this case involving decreased population of the d(z(2)) orbital of Pd(2) and strengthening of the Pd(I)-Pd(III) interaction in the analogous intermediate with η(2)-coordination at Pd(1) by L-Ph-N, C(1)-C(2).
Synthesis and structural studies of phenyl(iodo)- and methyl(phenyl)palladium(II) complexes of bidentate nitrogen donor ligands
Publisher: Elsevier BV
Date: 11-1994
Cyclometallation of polydentate ligands containing pyrazole groups, including the synthesis of platinum(IV) complexes with tripodal [NCN]- ligand systems
Publisher: Elsevier BV
Date: 05-1990
Organomercury compounds. XI. Some coordination derivatives of bispentafluorophenylmercury
Publisher: CSIRO Publishing
Date: 1971
DOI: 10.1071/CH9710489
Abstract: The complexes (C6F5)2HgL (L = 4,4?-dimethyl-2,2?-bipyridyl, 2,2?- biquinolyl, 2,2?:6?,2?-terpyridyl, 2,4,7,9,-tetramethyl-1,10- phenanthroline, ethylenediamine, o-phenylenediamine, diphenylamine, pyridine, 4-cyanopyridine, triphenylphosphine, triphenylphosphine oxide, or 1,2-bisdiphenylarsinoethane), (C6F5)2HgL2 (L = di-2- pyridylamine), and [(C6F5)2Hg]2L (L = bisdiphenylphosphinomethane or bisdiphenyl-arsinomethane) have been prepared, and their constitution, solution stabilities, and structures studied, together with those of the known complexes (C6F5)2HgL (L = 2,2?- bipyridyl, 1,10-phenanthroline, or 1,2-bisdiphenylphosphinoethane). Coordination of triphenylarsine oxide to bispentafluorophenylmercury in solution has also been detected, but the complex could not be isolated.
Mono(p-tolyl)platinum(II) and bis(p-tolyl)platinum(II) complexes of diethylsulfide as reagents for organoplatinum synthesis. Structures of [Pt(p-Tol)2(μ-SEt2)]2 and PtCl(p-Tol)(bpy) (bpy=2,2′-bipyridi
Publisher: Elsevier BV
Date: 2002
Electrochemistry of dimeric organopalladium(II) complexes containing bridging pyridin-2-yl(phenyl)methyl-C,N (-) and bis(pyridin-2-yl)phenylmethyl-C,N,N' (-) groups
Publisher: Elsevier BV
Date: 10-1996
Co-ordination chemistry of dimethylgold(III). Synthesis, spectroscopic, and structural studies of complexes with neutral aromatic nitrogen-donor ligands
Publisher: Royal Society of Chemistry (RSC)
Date: 1982
DOI: 10.1039/DT9820001795
Synthesis of methylpalladium(II) cationic complexes from [PdMe(SMe2(μ-I)]2. Crystal structure of [PdMe(bpy)(γ-pic)]BF4
Publisher: Elsevier BV
Date: 08-1990
DFT characterisation of a PdII → IIII adduct, and a PdII complex formed after oxidative alkenylation of PdII by [Ph(alkenyl)IIII]+, in Pd-mediated synthesis of benzofurans involving PdIV, annulation and chain-walking
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2DT00759B
Abstract: Pd II (C∼C)(bipy)-mediated synthesis of benzofurans utilising [Ph(alkenyl)I III ] + reagents occurs via ‘Pd II → I III ’ adducts, Pd IV species, C aryl ⋯C alkenyl coupling giving Pd II complexes, annulation, and chain-walking processes to form the lowest energy benzofuran isomer.
Organomercury compounds. Vii. complexes of arylmercuric halides with bidentate ligands
Publisher: CSIRO Publishing
Date: 1968
DOI: 10.1071/CH9681757
Abstract: The complexes, C6F5HgXL2 [X = Br or C1 L2 = 2,2'-bipyridyl (bipy), 1,l0-phenanthroline (phen), 3,4,7,8-tetramethyl-1,l0-phenanthroline (tmp), or 2,9-dimethyl-1,l0-phenanthroline (dmp)], C6Cl5HgClL2 (L, = phen, tmp, or dmp), and PhHgClL2 (L2 = phen or tmp), have been prepared, but attempts to prepare PhHgCl bipy or complexes of phenylmercuric bromide were unsuccessful. Evidence that the complexes contain four coordinate mercury has been obtained from infrared spectroscopy. All complexes, except C6Cl5HgCl phen, C6Cl5HgCl dmp, and PhHgCl tmp, undergo complete or partial disproportionation reactions, 2RHgXL2 → L2HgX2 +R2HgL2 (or R2Hg + L2), in boiling benzene. Although disproportionation or low solubility precludes solution studies on the majority of the derivatives, it has been shown that C6F5HgX dmp complexes are monomeric in acetone and that PhHgCl phen undergoes dissociation, PhHgCl phen + PhHgCl + phen, in this solvent. Four-coordinate complexes of mercuric halides with neutral ligands, L,HgX, (L = a neutral unidentate or L, = a neutral bidentate ligand X = C1, Br, or I), are well kno~n,l-~ but analogous complexes of organomercuric halides, viz. RHgXL,, were unknown prior to this investigation. Reactions of organomercuric halides with ligands generally result in disproportionation, the corresponding diorganomercurial and mercuric halide complex being f~rmed.~-~ In some cases intermediate complexes RHgL+X- have been i~olated~,~ or detected in soluti~n,~-~~ and a 1 : 1 complex of unknown structure between pyridine and cis-2- * Part VI, J. organomet. Chem., in press. Preliminary communications for Part VII: Canty, A. J., Deacon, G. B., and Felder, P. W., Inorg. nzlcl. Chem. Lett., 1967,3,263 Deacon, G. B., and Canty, A. J., Inorg. %ucl. Chem. Lett., 1968, 4, 128. t Chemistry Department, Monash University, Clayton, Vie. 3168. Evans, R. C., Mann, F. G., Peiser, H. S., and Purdie, D., J. chem. Soc., 1940, 1209. Cass, R. C., Coates, G. E., and Hayter, R. G., J. chem. Soc., 1955, 4007. Coates, G. E., and Ridley, D., J. chem. Soc., 1964, 166. Coates, G. E. "Organometallic Compounds." 2nd. Edn, pp. 78-82. (Methuen: London 1960.) Seyferth, D., and Towe, R. H., Inorg. Chem., 1962, 1, 185. Coates, G. E., and Lauder, A., J. chem. Soc., 1965, 1857. Brodersen, K., Chem. Ber., 1957, 90, 2703. Schwarzenbach, G., and Schellenberg, & I., Helv. chim. Acta, 1965, 48, 28. Goggin, P. L., and Woodward, L. A., Trans. Faraday Soc., 1962, 58, 1495. Dessy, R. E., Budde, W. L., and Woodruff, C., J. Am. chem. Soc., 1962, 84, 1172. Aust. J. Chem., 1968, 21, 1757-67
Synthesis, reactivity, and structural studies in trimethylpalladium(IV) chemistry, including PdIMe3(bpy) and [MMe3((pz)3CH)]+ (M = palladium, platinum)
Publisher: American Chemical Society (ACS)
Date: 03-1990
DOI: 10.1021/OM00117A044
Substituent effects in the decarboxylation reactions of coordinated arylcarboxylates in dinuclear copper complexes, [(napy)Cu2(O2CC6H4X)]+
Publisher: SAGE Publications
Date: 04-09-2017
Abstract: A combination of gas-phase ion trap mass spectrometry experiments and density functional theory (DFT) calculations have been used to examine the role of substituents on the decarboxylation of 25 different coordinated aromatic carboxylates in binuclear complexes, [(napy)Cu 2 (O 2 CC 6 H 4 X)] + , where napy is the ligand 1,8-naphthyridine (molecular formula, C 8 H 6 N 2 ) and X = H and the ortho ( o), meta ( m) and para ( p) isomers of F, Br, CN, NO 2 , CF 3 , OAc, Me and MeO. Two competing unimolecular reaction pathways were found: decarboxylation to give the organometallic cation [(napy)Cu 2 (C 6 H 4 X)] + or loss of the neutral copper benzoate to yield [(napy)Cu] + . The substituents on the aryl group influence the branching ratios of these product channels, but decarboxylation is always the dominant pathway. Density functional theory calculations reveal that decarboxylation proceeds via two transition states. The first enables a change in the coordination mode of the coordinated benzoate in [(napy)Cu 2 (O 2 CC 6 H 4 X)] + from the thermodynamically favoured O, O-bridged form to the O-bound form, which is the reactive conformation for the second transition state which involves extrusion of CO 2 with concomitant formation of the CO 2 coordinated organometallic cation, [(napy)Cu 2 (C 6 H 4 X)(CO 2 )] + , which then loses CO 2 in the final step to yield [(napy)Cu 2 (C 6 H 4 X)] + . In all cases the barrier is highest for the second transition state. The o-substituted benzoates show a lower activation energy than the m-substituted ones, while the p-substituted ones have the highest energy, which is consistent with the experimentally determined normalised collision energy required to induce fragmentation of [(napy)Cu 2 (O 2 CC 6 H 4 X)] + .
The oxidative addition of lodomethane to [PdMe2(bpy)] and the X-ray structure of the organopalladium(IV) product fac-[PdMe3(bpy)l](bpy = 2,2′-bipyridyl)
Publisher: Royal Society of Chemistry (RSC)
Date: 1986
DOI: 10.1039/C39860001722
High co-ordination numbers for methylmercury(II); X-ray and1H n.m.r. studies of [MeHgL]NO3(L = 4,4′,4″-triethyl-2,2′:6′,2″-terpyridyl and di-2-pyridylmethane)
Publisher: Royal Society of Chemistry (RSC)
Date: 1980
DOI: 10.1039/C39800000316
Palladium-Mediated CO2 Extrusion Followed by Insertion of Isocyanates for the Synthesis of Benzamides: Translating Fundamental Mechanistic Studies To Develop a Catalytic Protocol
Publisher: American Chemical Society (ACS)
Date: 28-01-2020
A one-pot route to thioamides discovered by gas-phase studies: palladium-mediated CO2 extrusion followed by insertion of isothiocyanates
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC00865A
Abstract: A palladium mediated synthesis of thioamides from aromatic carboxylic acids and substituted isothiocyanates was discovered by gas-phase experiments and theoretical studies.
Synthesis of potential platinum(II) anti-tumor complexes: Complexes containing bidentate pyridyl and imidazolyl donors
Publisher: Elsevier BV
Date: 1981
Carbon–Carbon Bond-Forming Reductive Elimination from Isolated Nickel(III) Complexes
Publisher: American Chemical Society (ACS)
Date: 02-12-2016
DOI: 10.1021/JACS.6B10350
Abstract: This manuscript describes the design, synthesis, characterization, and reactivity studies of organometallic Ni
Access to Alkynylpalladium(IV) and -Platinum(IV) Species, Including Triorgano(diphosphine)metal(IV) Complexes and the Structural Study of an Alkynyl(pincer)platinum(IV) Complex, Pt(O2CAr
Publisher:
American Chemical Society (ACS)
Date:
07-2006
DOI:
10.1021/OM0601495
Publisher: American Chemical Society (ACS)
Date: 07-2006
DOI: 10.1021/OM0601495
(2,2'-Bipyridyl-N,N')dibromopalladium(II)
Publisher: International Union of Crystallography (IUCr)
Date: 15-08-1997
Conformational studies in palladium (IV) and platinum (IV) chemistry. Crystal structure of the 1,1-bis(pyrazol-l-yl)- ethane complex fac-PtIMe3(pz)2CHMe-N, N′
Publisher: Elsevier BV
Date: 07-1992
Facial and meridional [NCN]− intramolecular coordination systems: structure of fac-PtBrMe2{2,6-(pzCH2)2C6H3}·1/2C6H6 {[2,6-(pzCH2)2C6H3]−=2,6-(bis{(pyrazol-1-yl)methyl}phenyl)} and mer-PtBr{2,6-(3,5
Publisher: Elsevier BV
Date: 04-2000
Liberation of carbon monoxide from formic acid mediated by molybdenum oxyanions
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3DT01983G
Electrospray Ionization Tandem Mass Spectrometry and DFT Survey of Copper(I) Ate Complexes Containing Coordinated Borohydride Anions
Publisher: American Chemical Society (ACS)
Date: 24-06-2022
Abstract: Copper(I) borohydride ate complexes of the type Cat
Coupling of acetylenes held proximate to a metal: alkyne-alkyne interactions in cis-phosphinoacetylene complexes, including structural characterization of the unsymmetrical diphosphine 1-phenyl-2,3-bi
Publisher: American Chemical Society (ACS)
Date: 11-1993
DOI: 10.1021/IC00076A022
Phenylpalladium(IV) Chemistry: Selectivity in Reductive Elimination from Palladium(IV) Complexes and Alkyl Halide Transfer from Palladium(IV) to Palladium(II)
Publisher: American Chemical Society (ACS)
Date: 05-1994
DOI: 10.1021/OM00017A071
Synthesis and Theoretical Studies of a Diorganohydridoplatinum(IV) Complex, PtHMe2{(pz)3BH-N,N‘,N‘‘} ([(pz)3BH]- = Tris(pyrazol-1-yl)bo
Publisher: American Chemical Society (ACS)
Date: 11-06-1996
DOI: 10.1021/OM950867J
Synthesis and reactivity of poly(pyrazol-1-yl)borate derivatives of cyclopalladation systems, including structural studies of Pd{2-CH2C6H4P(o-tolyl)2-C,P}{(pz)3BH-N,N′} and Pd(C6H4C5H4N-C2,N′){(pz)3BH
Publisher: Elsevier BV
Date: 02-1998
Crystal and molecular structure of the 2 : 1 adduct of bis(pentafluorophenyl)mercury(II) and bis(diphenylarsino)methane
Publisher: Royal Society of Chemistry (RSC)
Date: 1972
DOI: 10.1039/DT9720000511
Crystal and molecular structure of (2,2′-bipyridyl)methylmercury(II) nitrate, a complex with irregular three-co-ordination
Publisher: Royal Society of Chemistry (RSC)
Date: 1976
DOI: 10.1039/DT9760002018
Reversible oxidative addition of a diaryl diselenide to a diorganopalladium(II) complex, carbon–selenium bond formation at palladium(IV), and structural studies of palladium(II) and platinum(IV) selen
Publisher: Elsevier BV
Date: 02-2004
Gas-Phase Synthesis and Reactivity of Ligated Group 10 Ions in the Formal +1 Oxidation State
Publisher: American Chemical Society (ACS)
Date: 10-06-2019
DOI: 10.1007/S13361-019-02231-5
Abstract: Electrospray ionization of the group 10 complexes [(phen)M(O
Aryl–CF3 Coupling from Phosphinoferrocene-Ligated Palladium(II) Complexes
Publisher: American Chemical Society (ACS)
Date: 04-01-2019
Synthesis and structure of alkynylplatinum(IV) complexes containing the pincer group [2,6-(dimethylaminomethyl)phenyl-N,C,N]−
Publisher: Elsevier BV
Date: 2005
Cluster transformation of [Cu3(μ3-H)(μ3-BH4)((PPh2)2NH)3](BF4) to [Cu3(μ3-H)(μ2,μ1-S2CH)((PPh2)2NH)3](BF4) via reaction with CS2. X-ray structural characterisation and reactivity of cationic clusters explored by multistage mass spectrometry and computational studies
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT03510A
Abstract: [Cu 3 (μ 3 -H)(μ 3 -BH 4 )((PPh 2 ) 2 NH) 3 ](BF 4 ) reacts with CS 2 to produce [Cu 3 (μ 3 -H)(μ 2 ,μ 1 -S 2 CH)((PPh 2 ) 2 NH) 3 ](BF 4 ), whose cation loses CH 2 S upon ligand loss.
Heterophase fcc-2H-fcc gold nanorods
Publisher: Springer Science and Business Media LLC
Date: 03-07-2020
DOI: 10.1038/S41467-020-17068-W
Abstract: The crystal phase-based heterostructures of noble metal nanomaterials are of great research interest for various applications, such as plasmonics and catalysis. However, the synthesis of unusual crystal phases of noble metals still remains a great challenge, making the construction of heterophase noble metal nanostructures difficult. Here, we report a one-pot wet-chemical synthesis of well-defined heterophase fcc-2H-fcc gold nanorods (fcc: face-centred cubic 2H: hexagonal close-packed with stacking sequence of “AB”) at mild conditions. Single particle-level experiments and theoretical investigations reveal that the heterophase gold nanorods demonstrate a distinct optical property compared to that of the conventional fcc gold nanorods. Moreover, the heterophase gold nanorods possess superior electrocatalytic activity for the carbon dioxide reduction reaction over their fcc counterparts under ambient conditions. First-principles calculations suggest that the boosted catalytic performance stems from the energetically favourable adsorption of reaction intermediates, endowed by the unique heterophase characteristic of gold nanorods.
Interaction of methylmercury(II) with N-substituted pyrazoles. .sigma.-Donor ability of pyridines, imidazoles, and pyrazoles
Publisher: American Chemical Society (ACS)
Date: 08-1982
DOI: 10.1021/OM00068A012
Revealing Cation-Exchange-Induced Phase Transformations in Multielemental Chalcogenide Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 23-10-2017
Mechanisms of d8 organometallic reactions involving electrophiles and intramolecular assistance by nucleophiles
Publisher: American Chemical Society (ACS)
Date: 10-1995
DOI: 10.1021/AR00058A002
Organo(organooxo)mercury(II) chemistry Synthesis and structure of methyl(phenoxo)mercury(II)
Publisher: Canadian Science Publishing
Date: 02-2006
DOI: 10.1139/V05-219
Abstract: Methyl(phenoxo)mercury(II) may be obtained from the reaction of methyl(chloro)mercury(II) with silver(I) oxide, followed by addition of phenol. The dominant motif of the structure is a pair of independent MeHgOPh aggregates (HgC,O 2.05(2) Å, 2.06(1) Å (x2) C-Hg-O 176.6(5)°, 176.3(5)°) loosely associated about a quasi-inversion centre by Hg···O interactions (2.702(9) Å, 2.719(9) Å) to form a dimer (Hg-O-Hg′ 106.0(4)°, 106.5(4)° O-Hg-O′ 73.0(3)°, 72.6(3)°), the dimer stacking up the short crystallographic c axis (= 6.914(1) Å) at spacings c/2. Vibrational spectroscopic studies are insensitive to the associative interactions. Key words: mercury, methylmercury, organomercury, structure, aryloxide, phenoxide.
Oxidatively Induced C–H Activation at High Valent Nickel
Publisher: American Chemical Society (ACS)
Date: 20-04-2017
DOI: 10.1021/JACS.7B02387
Abstract: This communication describes a series of oxidatively induced intramolecular arene C-H activation reactions of Ni
Organometallic compounds containing a guanidinium group. Crystal and molecular structure of (creatinine)phenylmercury(II) nitrate monohydrate
Publisher: International Union of Crystallography (IUCr)
Date: 03-1979
Nickel(IV)-Catalyzed C–H Trifluoromethylation of (Hetero)arenes
Publisher: American Chemical Society (ACS)
Date: 05-08-2019
DOI: 10.1021/JACS.9B06383
Desulfination versus decarboxylation as a means of generating three- and five-coordinate organopalladium complexes [(phen)nPd(C6H5)]+ (n = 1 and 2) to study their fundamental bimolecular reactivity
Publisher: Elsevier BV
Date: 03-2019
Theoretical Investigation into the Mechanism of 3′-dGMP Oxidation by [PtIVCl4(dach)]
Publisher: American Chemical Society (ACS)
Date: 27-12-2012
DOI: 10.1021/IC3018425
Abstract: The mechanism for the oxidation of 3'-dGMP by [PtCl(4)(dach)] (dach = diaminocyclohexane) in the presence of [PtCl(2)(dach)] has been investigated using density functional theory. We find that the initial complexation, i.e., the formation of [PtCl(3)(dach)(3'-dGMP)], is greatly assisted by the reaction of the encounter pair [PtCl(2)(dach)···3'-dGMP] with [PtCl(4)(dach)], leading to migration of an axial chlorine ligand from platinum(IV) to platinum(II). A dinuclear platinum(II) latinum(IV) intermediate could not be found, but the reaction is predicted to pass through a platinum(III) latinum(III) transition structure. A cyclization process, i.e., C8-O bond formation, from [PtCl(3)(dach)(3'-dGMP)] occurs through an intriguing phosphate-water-assisted deprotonation reaction, analogous to the opposite of a proton shuttle mechanism. Followed by this, the guanine moiety is oxidized via dissociation of the Pt(IV)-Cl(ax) bond, and the cyclic ether product is finally formed after deprotonation. We have provided rationalizations, including molecular orbital explanations, for the key steps in the process. Our results help to explain the effect of [PtCl(4)(dach)] on the complexation step and the effect of a strong hydroxide base on the cyclization reaction. The overall reaction cycle is intricate and involves autocatalysis by a platinum(II) species.
Structural chemistry of [MX2(bipy)] (M = Pd, Pt; X = Cl, Br, I): The yellow polymorph of dichlorido(2,2′-bipyridine)platinum(ii) and diiodido(2,2′-bipyridine)palladium(ii), and overview of this System
Publisher: CSIRO Publishing
Date: 2011
DOI: 10.1071/CH11095
Abstract: Synchrotron data have been used to determine the structures of the yellow polymorph of dichlorido(2,2′-bipyridine)platinum(ii) (1), and diiodido(2,2′-bipyridine)palladium(ii) (2), allowing a detailed comparison of the crystal chemistry of [MX2(bipy)] (M = Pd, Pt X = Cl, Br, I), which exhibit polymorphism involving nine structures distributed over five space groups. Complex 1 crystallizes in space group Pbca (a = 18.2540(7), b = 15.6970(7), c = 7.3560(6) Å), and 2 in space group C2/c (a = 17.149(1), b = 9.8050(8), c = 7.548(1) Å, β = 110.72(1) °).
Arylation of palladium(II) and platinum(II) by diphenyliodonium triflate to form metal(IV) species, and a structural analysis of an isomer of PtIMe2Ph(bpy) (bpy=2,2’-bipyridine)
Publisher: Elsevier BV
Date: 11-2000
Scanning Confocal Electron Energy-Loss Microscopy Using Valence-Loss Signals
Publisher: Oxford University Press (OUP)
Date: 22-05-2013
DOI: 10.1017/S1431927613001438
Abstract: Finding a faster alternative to tilt-series electron tomography is critical for rapidly evolving fields such as the semiconductor industry, where failure analysis could greatly benefit from higher throughput. We present a theoretical and experimental evaluation of scanning confocal electron energy-loss microscopy (SCEELM) using valence-loss signals, which is a promising technique for the reliable reconstruction of materials with sub-10-nm resolution. Such a confocal geometry transfers information from the focused portion of the electron beam and enables rapid three-dimensional (3D) reconstruction by depth sectioning. SCEELM can minimize or eliminate the missing-information cone and the elongation problem that are associated with other depth-sectioning image techniques in a transmission electron microscope. Valence-loss SCEELM data acquisition is an order of magnitude faster and requires little postprocessing compared with tilt-series electron tomography. With postspecimen chromatic aberration ( C c ) correction, SCEELM signals can be acquired in parallel in the direction of energy dispersion with the aid of a physical pinhole. This increases the efficiency by 10×–100×, and can provide 3D resolved chemical information for multiple core-loss signals simultaneously.
Cover Feature: Computational Study of Bridge Splitting, Aryl Halide Oxidative Addition to PtII, and Reductive Elimination from PtIV: Route to Pincer‐PtII Reagents with Chemical and Biological Applications (Chem. Eur. J. 62/2021)
Publisher: Wiley
Date: 22-10-2021
Synthesis and structural analysis of the methylindium(III) binuclear cation [(H2O)Me,nMe(NO3)]+, where the alkoxide bridges are formed by bis(N-methylimidazol-2-yl)-(pyridin-2-yl)methanolato-groups
Publisher: Elsevier BV
Date: 07-1986
Positive and negative ion electrospray mass spectrometric studies of some amino acids and glutathione, and their interactions with alkali metal ions and methylmercury(II)
Publisher: Elsevier BV
Date: 08-1994
Structural studies of unusually disordered diorganoplatinum(IV) complexes containing the cations [PtIR2(L-N,N′,N″)]+, where the
Publisher: Elsevier BV
Date: 02-1992
Computational Analysis of Mesomerism in para‐Substituted mer‐NCN Pincer Platinum(II) Complexes, Including its Relationships with Hammett σp Substituent Parameters
Publisher: Wiley
Date: 22-10-2020
Synthesis and Decomposition Behavior of Pallada(IV)cyclopentane Complexes
Publisher: American Chemical Society (ACS)
Date: 17-04-1998
DOI: 10.1021/OM980005T
Binuclear intermediates in oxidation reactions: [(Me3SiC≡ C)Me2(bipy)Pt-PtMe2(bipy)]+ in the oxidation of PtIIMe2(bipy) (bipy = 2,2′-bipyridine) by IPh(C≡CSiMe3)(OTf) (OTf = triflate)
Publisher: American Chemical Society (ACS)
Date: 07-05-2009
DOI: 10.1021/JA902799U
Abstract: A study of the reaction of PtMe(2)(bipy) with IPh(C[triple bond]CSiMe(3))(OTf) at low temperature in acetone, leading to detection of the Pt-Pt-bonded cation [Pt(2)Me(4)(C[triple bond]CSiMe(3))(bipy)(2)](+), an intermediate in the oxidation of Pt(II) to Pt(IV), is reported. The cation is assessed as Pt(III)-Pt(III) Pt(IV)-Pt(II), and at the other extreme may be regarded as a cationic alkynylplatinum(IV) center, "[Pt(IV)Me(2)(C[triple bond]CSiMe(3))(bipy)](+)", stabilized by "Pt(II)Me(2)(bipy)" as a donor ligand. The detection and isolation of the [Pt(2)Me(4)(C[triple bond]CSiMe(3))(bipy)(2)](+) cation provides a number of insights into the mechanisms of oxidation reactions.
Cu-Catalyzed Fluorination of Diaryliodonium Salts with KF
Publisher: American Chemical Society (ACS)
Date: 24-09-2013
DOI: 10.1021/OL4025716
Reactivity of Diaryliodine(III) Triflates toward Palladium(II) and Platinum(II): Reactions of C(sp2)−I Bonds to Form Arylmetal(IV) Complexes; Access to Dialkyl(aryl)metal(IV), 1,4-Benzened
Publisher: American Chemical Society (ACS)
Date: 04-06-2004
DOI: 10.1021/OM040023C
Computational Study of Carbostannylation Implicating Bimetallic Catalysis Involving “AuI–Vinyl–PdII” Species
Publisher: American Chemical Society (ACS)
Date: 12-02-2014
DOI: 10.1021/CS400836V
Carbon−Oxygen Bond Formation at Organopalladium Centers: The Reactions of PdMeR(L2) (R = Me, 4-tolyl; L2 = tmeda, bpy) with Diaroyl Peroxides and the Involvement of Organopallad
Publisher: American Chemical Society (ACS)
Date: 29-01-2004
DOI: 10.1021/OM030644Q
Organoselenium chemistry. Synthesis of selenetan-3-ol, 1-bromo-3-selenocyanatopropan-2-ol and 2-benzylseleno-substituted fumaricand succinic acids
Publisher: CSIRO Publishing
Date: 1983
DOI: 10.1071/CH9830815
Abstract: Approaches to the synthesis of diselenols have led to isolation of several new organoselenium compounds. Removal of mercury, as HgS, from [1,3-diselenylpropan-2-olato(2–)-Se,Sel]-mercury(II) results in decomposition of the organoselenium fragment to selenetan-3-ol, 1,3-Dibromopropan-2-ol reacts with KSeCN to form 1-bromo-3-selenocyanatopropan-2-ol the selenoethers 2-(benzyl- se1eno)fumaric acid [(Z)-PhCH2SeC(CO2H)=CHCO2H] and 2-(benzylseleno)succinic acid [PhCH2SeCH(CO2H)CH2CO2H] are formed by base-catalysed reaction of phenylmethaneselenol with acetylenedicarboxylic acid and maleic acid, respectively. The conformations adopted by PhCH2XCH(CO2H)CH2CO2H (X = S, Se) in acetone have been determined by 1H n.m.r. spectroscopy.
Using electrospray ionization‐tandem mass spectrometry to explore formation and gas‐phase chemistry of silver nanoclusters generated from the reaction of silver salts with NaBH4 in the presence of bis(diphenylarsino)methane
Publisher: Wiley
Date: 28-07-2021
DOI: 10.1002/JMS.4590
Tris [ N ‐(3‐ tert ‐Butyl) Pyrazolyl] methane
Publisher: Wiley
Date: 1998
Structural Chemistry of the Platinum Group-Metals: MCl2(bpy) (M = Pd, Pt, bpy = 2,2′-Bipyridine)
Publisher: CSIRO Publishing
Date: 1992
DOI: 10.1071/CH9920417
Abstract: A singlecrystal X-ray structure determination of (2,2′-bipyridine)dichloropalladium(II), iso- morphous with the 'yellow' form of the platinum(II) analogue, has been carried out. Crystals are orthorhombic, Pbca, a 18.144(5), b 15.952(5), c 7.494(2) A, Z 8, 1113 diffractometer reflections being refined by full matrix least squares to a residual of 0.052. The planar molecules of PdCl2(bpy) are stacked into columns along the c direction, at a separation of c/2, neighbouring molecules in the stacks being related by glide planes with Pd…Pd separations of 4.587(2) A.
Gas-Phase Reactions of the Group 10 Organometallic Cations, [(phen)M(CH3)]+ with Acetone: Only Platinum Promotes a Catalytic Cycle via the Enolate [(phen)Pt(OC(CH2)CH3)]+
Publisher: Walter de Gruyter GmbH
Date: 04-03-2019
Abstract: Electrospray ionisation of the ligated group 10 metal complexes [(phen)M(O 2 CCH 3 ) 2 ] (M = Ni, Pd, Pt) generates the cations [(phen)M(O 2 CCH 3 )] + , whose gas-phase chemistry was studied using multistage mass spectrometry experiments in an ion trap mass spectrometer with the combination of collision-induced dissociation (CID) and ion-molecule reactions (IMR). A new catalytic cycle has been discovered. In step 1, decarboxylation of [(phen)M(O 2 CCH 3 )] + under CID conditions generates the organometallic cations [(phen)M(CH 3 )] + , which react with acetone to generate the [(phen)M(CH 3 )(OC(CH 3 ) 2 )] + adducts in competition with formation of the coordinated enolate for M = Pt (step 2). For M = Ni and Pd, the adducts regenerate [(phen)M(CH 3 )] + upon CID. In the case of M = Pt, loss of methane is favored over loss of acetone and results in the formation of the enolate complex, [(phen)Pt(OC(CH 2 )CH 3 )] + . Upon further CID, both methane and CO loss can be observed resulting in the formation of the ketenyl and ethyl complexes [(phen)Pt(OCCH)] + and [(phen)Pt(CH 2 CH 3 )] + (step 3), respectively. In step 4, CID of [(phen)Pt(CH 2 CH 3 )] + results in a beta-hydride elimination reaction to yield the hydride complex, [(phen)Pt(H)] + , which reacts with acetic acid to regenerate the acetate complex [(phen)Pt(O 2 CCH 3 )] + and H 2 in step 5. Thus, the catalytic cycle is formally closed, which corresponds to the decomposition of acetone and acetic acid into methane, CO, CO 2 , ethene and H 2 . All except the last step of the catalytic cycle are modelled using DFT calculations with optimizations of structures at the M06/SDD 6-31G(d) level of theory.
DFT studies of two-electron oxidation, photochemistry, and radical transfer between metal centres in the formation of platinum(iv ) and palladium(iv ) selenolates from diphenyldise
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0DT02978E
Abstract: Excitation by light to the M–M antibonding orbital of [M III Me 2 (2,2′-bipyridine)(SePh)] 2 releases 2[M III Me 2 (bipy)(SePh)]˙ the doublets react to give M IV Me 2 (bipy)(SePh) 2 and M II Me 2 (bipy).
Electrospray mass spectrometry of inert and labile metal alkyl compounds: a study of methyl and dimethyl derivatives of gold(III), indium(III) and thallium(III)
Publisher: Elsevier BV
Date: 08-1993
Periphery-Palladated Carbosilane Dendrimers: Synthesis and Reactivity of Organopalladium(II) and -(IV) Dendritic Complexes. Crystal Structure of [PdMe(C6H4(OCH2Ph)-4)
Publisher: American Chemical Society (ACS)
Date: 08-07-1999
DOI: 10.1021/OM9901269
Synthesis, structure, and condensed-phase reactivity of [Ag3(μ3-H)(μ3-BH4)LPh3](BF4) (LPh = bis(diphenylphosphin
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8DT02437E
Abstract: Electrospray ionisation mass spectrometry (ESI-MS) was used to monitor the reaction of AgBF 4 , bis(diphenylphosphino)amine (dppa = (Ph 2 P) 2 NH = L Ph ) and NaBH 4 in acetonitrile.
Methylmercury(II) sulfhydryl interactions. Potentiometric determination of the formation constants for complexation of methylmercury(II) by sulfhydryl containing amino acids and related molecules, including glutathione
Publisher: Canadian Science Publishing
Date: 07-1983
DOI: 10.1139/V83-250
Abstract: Formation constants for the interaction of methylmercury(II) with 2-mercaptoethanol, mercaptoacetic acid, O-methyl-mercaptoacetate, 2-mercaptosuccinic acid, L-cysteine, D,L-penicillamine, N-acetyl-D,L-penicillamine, glutathione, thiocholine, and 4-mercapto-N-methylpiperidine have been determined by potentiometric titration. For the equilibrium [Formula: see text], log β occurs in the range 14.60(1)–17.14(1), with the lowest value obtained for the cationic complex of thiocholine, [Formula: see text]. Acid dissociation constants for the ligands are reported. Formation constants for the addition of both one and two equivalents of MeHg(II) to L-cysteine have been determined, giving log K ca. 4.1 for the reaction[Formula: see text]occurring at low pH, and log K 8.8 for the reaction[Formula: see text]occurring at higher pH.
Facet development during platinum nanocube growth
Publisher: American Association for the Advancement of Science (AAAS)
Date: 22-08-2014
Abstract: Size and shape drive the properties of metal nanoparticles. Understanding the factors that affect their growth is central to making use of the particles in a range of applications. Liao et al. tracked the growth of platinum nanoparticle shapes at high resolution using state-of-the-art liquid cells for in situ monitoring inside an electron microscope. The authors tracked changes in the growth rates at different crystal facets caused by differences in the mobility of the capping ligand. Science , this issue p. 916
Computational Study of Intramolecular Coordination Enhanced Oxidative Addition to form PdIV-Pincer Complexes, and Selectivity in Aryloxide Attack at PdIVCH2CRR′ Motifs in Palladium-Mediated Organic Synthesis
Publisher: American Chemical Society (ACS)
Date: 28-04-2021
Intramolecular co-ordination by a hydroxy-group to methylmercury(II). Synthesis and characterization of complexes [HgMe(L)]NO3 containing polydentate ligands (L), and the crystal structure of the tris(N-methylimidazol-2-yl)methanol complex
Publisher: Royal Society of Chemistry (RSC)
Date: 1983
DOI: 10.1039/DT9830001873
Macroporous monolith supports for continuous flow capillary microreactors
Publisher: Elsevier BV
Date: 12-2006
Carbon–oxygen bond formation at organopalladium centres
Publisher: Elsevier BV
Date: 11-2001
SnBrMe3 and dichalcogenides (ER)2 as oxidants: Synthesis of platinum(IV) complexes, and C⋯C and C⋯E coupling from pallada(IV)cyclopentane complexes and PdMe2(EPh){(pz)3BH} {E=O2C, S, Se; [(pz)3BH]−=tr
Publisher: Elsevier BV
Date: 08-1998
Mechanistic Investigations of Cu-Catalyzed Fluorination of Diaryliodonium Salts: Elaborating the CuI/CuIII Manifold in Copper Catalysis
Publisher: American Chemical Society (ACS)
Date: 22-09-2014
DOI: 10.1021/OM5007903
Organopalladium(IV) chemistry: oxidative addition of organohalides to dimethylpalladium(II) complexes to form ethyl, σ-benzyl, and σ-allylpalladium(IV) complexes
Publisher: Royal Society of Chemistry (RSC)
Date: 1988
DOI: 10.1039/C39880000639
Synthetic routes to methylpalladium(II) and dimethylpalladium(II) chemistry and the synthesis of new nitrogen donor ligand systems
Publisher: American Chemical Society (ACS)
Date: 1990
DOI: 10.1021/OM00115A033
1H and 199Hg NMR spectra of methylmercury(II) complexes. Effects of basicity and ortho substitution in pyridines(L) in complexes [MeHgL]NO3
Publisher: Elsevier BV
Date: 10-1979
Coordination chemistry of dimethylgold(III) and methylmercury(II). Synthesis, 1H N.M.R. and structural studies of Poly(pyrazol-1-yl)borate complexes
Publisher: CSIRO Publishing
Date: 1983
DOI: 10.1071/CH9831107
Abstract: Dimethylgold(III) and methylmercury(II) form complexes Me2AuL and MeHgL where L are poly-(pyrazol-1-yl)borate ligands [HB(pz)3]- and [B(pz)4]-. The structure of Me,Au{HB(pz)3} has been determined by single-crystal X-ray diffraction at 295 K and refined by least-squares methods to R 0.056 for 2194 independent 'observed' reflections. This complex has square-planar coordination for the gold atom involving two coordinated pyrazole rings and one uncoordinated ring, in contrast to the isoelectronic cation [Me2Au{(pz)3CH)]+ which has square planar coordination with a weak axial Au . .N interaction. Variable temperature 1H n.m.r. spectra in CD2Cl2 indicate presence of rapid equilibria between pyrazole ring environments at ambient temperature and, for the MeHgII complexes, down to -90�C. For the Me2AuIII complexes spectra at -90�C indicate presence of pyrazole ring environments in ratios 2 : 1 (L = [HB(pz)3]-) and 2 : 1 : 1 (L = [B(pz)4]-). Crystal data for Me2Au{HB(pz)3}: rhombohedral, space group R3c, a 17.98(1) �, α 117.98(5)�, Z 18.
Crystal Structure of Methanethiolatomercury(II) Chloride
Publisher: CSIRO Publishing
Date: 1979
DOI: 10.1071/CH9791165
Abstract: The crystal structure of the title compound, MeSHgCl, has been determined by single-crystal X-ray diffraction at 295 K and refined by full-matrix least squares to a residual of 0.048 for 787 'observed' reflections. Crystals are monoclinic, P21/c, a 7.490(4), b 7.395(2), c 7.815(3) �,β 92.93(4)�, Z 4, and are isostructural with the previously described MeSHgBr.
Microfluidic devices for flow-through supported palladium catalysis on porous organic monolith
Publisher: CSIRO Publishing
Date: 2008
DOI: 10.1071/CH08160
Abstract: Flow-through microreactors are described, constructed of fused silica capillaries with an internal diameter of 100 μm and glass microchips with a channel dimension of 150 μm and involving the in situ UV-initiated synthesis of a poly(glycidyl methacrylate-co-ethylene dimethacrylate) porous polymer monolith. The monolith is a continuous material covalently bonded to the capillary or chip walls, with good flow-through properties. Epoxide ring-opening through amine attack by 5-amino-1,10-phenanthroline and coordination to dichloropalladium(ii) allows use of the microreactors for Suzuki–Miyaura catalysis. The long-term stability and reliability of the robust chip microreactor is demonstrated by operation for 96 h, exhibiting undiminished reactivity, and very low leaching of palladium.
Development of organopalladium(IV) chemistry: fundamental aspects and systems for studies of mechanism in organometallic chemistry and catalysis
Publisher: American Chemical Society (ACS)
Date: 02-1992
DOI: 10.1021/AR00014A005
Cyclopalladation to form planar tridentate [N–C–N]–intramolecular co-ordination systems involving pyridine donor groups, including ligand synthesis and X-ray structural studies
Publisher: Royal Society of Chemistry (RSC)
Date: 1987
DOI: 10.1039/DT9870001477
Interaction of palladium(II) with polydentate ligands, including the synthesis and structure of bis[tris(pyrazol-1-yl)borato-N,N′]palladium(II) and the cations [Pd(L)2]2+[L = tris(pyrazol-1-yl)methane-N,N′ or tris(pyridin-2-yl)methane-N,N′]
Publisher: Royal Society of Chemistry (RSC)
Date: 1986
DOI: 10.1039/DT9860000645
Synthesis, spectroscopic, and structural studies of the methylpalladium(II ) complexes [{PdMe(SMe2)X}2](X = Cl, Br, or I); crystal structure of trans-[{PdMe(SMe2
Publisher:
Royal Society of Chemistry (RSC)
Date:
1986
DOI:
10.1039/DT9860001731
Carbon-13 chemical shifts of some pyridines, 2,2'-bipyridyls and 1,10-phenanthrolines
Publisher: CSIRO Publishing
Date: 1978
DOI: 10.1071/CH9781255
Abstract: 13C chemical shifts of pyridine, 2,2'-bipyridyl and 1,10-phenanthroline, and some of their methyl derivatives have been determined. All measurements were made on 0.25 M solutions in CDCl3, thus enabling comparisons of chemical shifts and substituent effects to be made without complications from solvent effects. For the three classes of compounds, common correlations exist between 13C chemical shifts and both CNDO/2 and INDO calculated carbon total electron densities, with the results suggesting that CNDO/2 calculations provide more suitable data for empirical correlations with 13C chemical shifts.
Connecting Binuclear Pd(III) and Mononuclear Pd(IV) Chemistry by Pd–Pd Bond Cleavage
Publisher: American Chemical Society (ACS)
Date: 17-07-2012
DOI: 10.1021/JA304401U
Abstract: Oxidation of binuclear Pd(II) complexes with PhICl(2) or PhI(OAc)(2) has previously been shown to afford binuclear Pd(III) complexes featuring a Pd-Pd bond. In contrast, oxidation of binuclear Pd(II) complexes with electrophilic trifluoromethylating ("CF(3)(+)") reagents has been reported to afford mononuclear Pd(IV) complexes. Herein, we report experimental and computational studies of the oxidation of a binuclear Pd(II) complex with "CF(3)(+)" reagents. These studies suggest that a mononuclear Pd(IV) complex is generated by an oxidation-fragmentation sequence proceeding via fragmentation of an initially formed, formally binuclear Pd(III), intermediate. The observation that binuclear Pd(III) and mononuclear Pd(IV) complexes are accessible in the same reactions offers an opportunity for understanding the role of nuclearity in both oxidation and subsequent C-X bond-forming reactions.
Nitrogen-doped cobalt phosphate@nanocarbon hybrids for efficient electrocatalytic oxygen reduction
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6EE01297C
Abstract: A nitrogen-doped Co 3 (PO 4 ) 2 @nanocarbon hybrid was developed as an oxygen reduction reaction (ORR) catalyst and exhibits outstanding catalytic performance with high activity, long-term stability and a four-electron transfer pathway.
Allenyl–propargyl tautomerism at palladium(IV) and platinum(IV) centres
Publisher: Elsevier BV
Date: 1999
Structural studies of mercury(II) halide pyridine complexes [HgX2(py)2], X = Cl, Br, or I
Publisher: Royal Society of Chemistry (RSC)
Date: 1982
DOI: 10.1039/DT9820000015
Gas‐phase studies of copper(I)‐mediated CO2 extrusion followed by insertion of the heterocumulenes CS2 or phenylisocyanate
Publisher: Wiley
Date: 24-06-2020
DOI: 10.1002/JMS.4579
Crystal and molecular structure of (3,3'-dimethyl-2,2'-bipyridyl)methylmercury(II) nitrate; a complex that may have weak intramolecular π-coordination
Publisher: International Union of Crystallography (IUCr)
Date: 11-1978
Characterization of tetra-aryl benzene isomers by using preparative gas chromatography with mass spectrometry, nuclear magnetic resonance spectroscopy, and x-ray crystallographic methods
Publisher: American Chemical Society (ACS)
Date: 04-05-2010
DOI: 10.1021/AC100417H
Abstract: The present study describes a preparative gas chromatographic (GC) approach employed to study a series of products arising from reaction of phenylacetylene with para-substituted aryl-iodides under Sonogashira catalysis conditions. GC analysis resolves the isomers from each reaction however, it cannot provide structural details (their MS data are virtually identical). Since classical liquid chromatography cannot resolve the isomers, preparative-scale GC is the only practical approach to provide further spectroscopic characterization of the isomers. The products are well separated by GC so a single thick-film capillary column is adequate for this case, with operation up to approximately +300 degrees C. By collection of 50+ repeat injections, sufficient material could be isolated for (1)H NMR spectral analysis of the isomers, and for one isomer (isomer I) of a number of analogous related catalytic reaction mixtures, X-ray crystal structure determination enabled complete structural elucidation (absolute configuration) of the substitution pattern of the structure of this isomer. This confirmed isomer I to be the 2-para-aryl-substituted 1,3,5-triphenylbenzene product in all cases. (1)H NMR spectra of isomer I products generally had similar patterns but differed markedly from the second major isomer product (isomer II).
Methylpalladium(II) complexes of pyrazole and thioether donor ligands
Publisher: Elsevier BV
Date: 10-1985
The crystal structure of [MeHg(py)]+ [NO3]-, a complex with linear geometry for methylmercury(II)
Publisher: CSIRO Publishing
Date: 1978
DOI: 10.1071/CH9781933
Abstract: Crystals of methyl(pyridine)mercury(II) nitrate are orthorhombic and belong to the space group P nma, with a 13.230(3), b 6.538(1), c 9.808(5) Ǻ and Z 4. The diffractometer data, measured with Mo Kα radiation, have been refined to an R index of 0.062 for the 857 observed terms. The crystals are composed of [MeHg(py)]+ cations and uncoordinated nitrate anions. The C-Hg-N moiety is linear, 179.7(6)°, and the N-Hg and C-Hg bonds have lengths of 2.12(2) and 2.04(3) Ǻ respectively.
Reactivity and mechanism in oxidative addition to palladium(II) and reductive elimination from palladium(IV) and an estimate of the palladium methyl bond energy
Publisher: American Chemical Society (ACS)
Date: 06-1988
DOI: 10.1021/OM00096A021
The Structure of [PdCl2{(Py)2(PyH)CH-N′,N″}][PdCl4]0.5.2H2O (Py = Pyridin-2-yl), a Complex With Protonated 2,2′,2″-Methylidynetrispyridine as a Bidentate Ligand
Publisher: CSIRO Publishing
Date: 1992
DOI: 10.1071/CH9920423
Abstract: Crystals of dichloro[2,2′,2″-methylidynetris(pyridin)-1-ium-N′,N″]palladium(II) hemi[tetra-chloropalladate(II)] dihydrate are monoclinic, P21/c, a 8.558(5), b 15.516(7), c 16.153(5) a, P 112.07(4)°, Z 4. The cations [PdCl2{(Py)2(PyH)CH-N′,N″}]+ have square-planar geometry for palladium, with the ligand in a boat conformation and having an uncoordinated protonated pyridine group.
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University Of California Berkeley/Lawrence Berkeley National Lab
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