ORCID Profile
0000-0002-4616-6001
Current Organisation
University of Nottingham
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Publisher: International Union of Crystallography (IUCr)
Date: 07-07-2010
Publisher: Wiley
Date: 24-03-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CY02086D
Abstract: Low-coordinate m -terphenyl complexes are precatalysts for dehydrocoupling of dimethylamine–borane, where small changes in coordination environment effect significant mechanistic differences.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3DT53234H
Abstract: Reaction between N , N ′-bis(aryl)amidines and di- n -butylmagnesium affords magnesium amidinates, where the steric bulk of the ligand influences both the solid state and solution behaviour of these complexes.
Publisher: American Chemical Society (ACS)
Date: 17-10-2013
DOI: 10.1021/IC4012923
Abstract: The synthesis and characterization of magnesium and calcium complexes of sterically demanding aminopyridinato ligands is reported. The reaction of the 2-Me3SiNH-6-MeC5H3N (L(1)H), 2-MePh2SiNH-6-MeC5H3N (L(2)H), and 2-Me3SiNH-6-PhC5H3N (L(3)H) with KH in tetrahydrofuran (THF) yielded potassium salts L(1)K(thf)0.5 (1), L(2)K (2), and L(3)K(thf)0.5 (3), which, through subsequent reaction with MgI2 and CaI2, afforded the homoleptic complexes (L)2Ae(thf)n [L = L(1), Ae = Mg, n = 1 (4) L = L(2), Ae = Mg, n = 0 (5) L = L(3), Ae = Mg, n = 0 (6) L = L(2), Ae = Ca, n = 2 (7)] and heterobimetallic calciates {[(L)3Ca]K}∞ [L = L(1) (8) L = L(2) (9)]. The solid state structure of 8 reveals a polymeric arrangement in which the calciate units are interlocked by bridging potassium ions. Metalation reactions between L(1)H or L(2)H and ((n)Bu)2Mg lead to the solvent-free compounds (L)2Mg [L = L(1) (10) L = L(2) (5)]. The bridged butyl mixed-metal complex [(L(1))Li(μ2-(n)Bu)Mg(L(1))]∞ (11) was also obtained via a cocomplexation reaction with (n)BuLi and ((n)Bu)2Mg. 11, which adopts a monodimensional polymeric array in the solid state, is a rare ex le of an alkyl-bridged Li/Mg complex and the first complex to feature an unsupported bridging butyl interaction between two metals. Changing the cocomplexation reaction conditions, the order of reagents added to the reactions mixture, and with the use of a coordinating solvent (tetrahydrofuran) formed the magnesiate complex (L(1))3MgLi(thf) (12).
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2DT03531F
Abstract: Demonstration that m -terphenyls are tuneable and versatile ligands capable of inducing highly axial ligand fields upon a low-coordinate metal centre.
Publisher: Wiley
Date: 12-07-2013
Abstract: The synthesis and characterization of the first series of low-coordinate bis(terphenyl) complexes of the Group 12 metals, [Zn(2,6-Naph2 C6 H3 )2 ] (1), [Cd(OEt2 )(2,6-Naph2 C6 H3 )2 ] (2) and [Hg(OEt2 )(2,6-Naph2 C6 H3 )2 ] (3) (Naph=1-C10 H7 ) are described. The naphthyl substituents of the terphenyl ligands confer considerable steric bulk, and as a result of limited flexibility introduce multiple conformations to these unusual systems. In the solid state, complex 1 features a two-coordinate Zn centre with the ligands oriented in a syn/anti conformation, whereas the three-coordinate distorted T-shaped complexes 2 and 3 feature the ligands in the syn/syn configurations. The results of DFT calculations are in good agreement with the solid-state configurations for these complexes and support the spectroscopic measurements, which indicate several conformers in solution.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CE00845D
Abstract: BODIPY chromophores with pyridyl or pyrimidinyl substituents exhibit strong solid-state fluorescence which is quenched in CuI coordination polymers.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC16047A
Abstract: The redox processes associated with BODIPY analogues are studied by electrochemical and spectroscopic methods revealing a characteristic profile for the persistent BODIPY radical and quenching of fluorescence upon reduction.
Publisher: Wiley
Date: 17-03-2015
Publisher: Elsevier BV
Date: 05-2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0DT01710H
Abstract: The synthesis and characterisation of low-coordinate zinc and cadmium complexes of the sterically demanding 1,3,6,8-tetra-tert-butylcarbazol-9-yl ligand ((t)Bu(4)carb(-)) are reported. ((t)Bu(4)carb)(2)M (M = Zn 1 M = Cd 2) are the first ex les of formally two-coordinate bis-carbazol-9-yl complexes of the Group 12 metals and 2 is the first crystallographically characterised two-coordinate amido complex of cadmium. The structure and bonding within these complexes are explored via a combination of X-ray crystallography and DFT calculations. The solid state structures for these zinc and cadmium complexes differ greatly from each other not only do the steric demands of the peripheral tert-butyl substituents in these systems act to inhibit solvent coordination, but they also influence the coordination geometry around the metal centres.
Publisher: Wiley
Date: 25-04-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4DT00647J
Abstract: The analysis of three series of two-coordinate Group 12 bis-terphenyl complexes highlights how subtle changes to ligand properties, particularly sterics, and, to a smaller extent, electronics have a large effect on the solid state structures adopted.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0DT03972A
Abstract: Spectroscopic and computational investigation of the effects of para -substituted m -terphenyl lithium complexes reveals significant electronic differences at the metal centre.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC03559A
Abstract: Synthesis of a new transition metal-group 13 cluster from a low-coordinate diaryl and “GaI”, demonstrates entry into new cluster compounds.
Publisher: American Chemical Society (ACS)
Date: 14-02-2013
DOI: 10.1021/IC302727W
Abstract: The solid state structures of alkali metal complexes of the 1,3,6,8-tetra-tert-butylcarbazol-9-yl ((t)Bu4carb(-)) ligand are compared. Lithium complex [(t)Bu4carbLi]2 ([1]2) is a dimer in the solid state featuring a planar LiNLiN rhomboid ring, with the differing Li-N distances within the ring due to the effects of σ- and π-interactions. Recrystallization of lithium, sodium, and potassium complexes of the 1,3,6,8-tetra-tert-butylcarbazol-9-yl ligand from THF leads to the formation of (t)Bu4carbLi(THF)2 (1·2THF), (t)Bu4carbNa(THF)3 (2·3THF), and (t)Bu4carbK(THF)4 (3·4THF), respectively, in the solid state. For these THF adducts, on proceeding from lithium to sodium to potassium there is an increase in hapticity of the binding of the carbazol-9-yl ligands to the metal cations, mirroring the increasing ionic bonding character in these compounds.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC34525K
Abstract: Cobalt(II) diaryl complexes react with CO to afford Co(2)(CO)(8) and sterically encumbered ketones whose structure varies depending on the nature of the aryl ligands.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CC08385H
Abstract: Alkali metal carbazolido complexes are precatalysts for the dehydrogenation of Me 2 NH·BH 3 , where the cation plays a vital role in the reaction outcome.
Publisher: Wiley
Date: 12-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9CP06427C
Abstract: A strategy to create organic molecules with high degrees of radical spin multiplicity is reported in which molecular design is correlated with the behaviour of radical anions in a series of BODIPY dyads.
Publisher: Wiley
Date: 24-03-2017
Abstract: The first transition metal catalyzed hydrophosphination of isocyanates is presented. The use of low-coordinate iron(II) precatalysts leads to an unprecedented catalytic double insertion of isocyanates into the P-H bond of diphenylphosphine to yield phosphinodicarboxamides [Ph
Publisher: Elsevier BV
Date: 03-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC46384B
Abstract: The reaction between sterically demanding m-terphenyl lithiate complexes and cadmium dihalides yields unusual cubanes where changes in ligand bulk afford different formulations, in particular a rare heterodicubane structure.
Publisher: MDPI AG
Date: 14-01-2020
Abstract: Functionalization of 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) chromophores at the 2,6-positions with iodo substituents and morpholino-substituted α-methyl groups affords molecules with strong absorbance in the visible spectrum. The effect of such substitution on the solid-state arrangements, absorption, fluorescence and electronic properties of these dye molecules is reported. The spectroscopic and spectroelectrochemical measurements display intense absorptions in the UV-visible spectrum with bathochromic shifts, in comparison to unfunctionalized BODIPY, and a positive shift in redox potentials due to functionalisation of the BODIPY core. Halogen bonds are observed in the solid-state structures of both halogenated BODIPY species, which in one case leads to the formation of an unusual halogen bonded framework.
Publisher: Springer Science and Business Media LLC
Date: 14-09-2018
DOI: 10.1038/S41467-018-06242-W
Abstract: Carbon monoxide is a key C 1 feedstock for the industrial production of hydrocarbons, where it is used to make millions of tonnes of chemicals, fuels, and solvents per annum. Many transition metal complexes can coordinate CO, but the formation of new C−C bonds in well-defined compounds from the scission and subsequent coupling of two or more CO moieties at a transition metal centre remains a challenge. Herein, we report the use of low-coordinate iron(II) complexes for the selective scission and homologation of CO affording unusual squaraines and iron carboxylates at ambient temperature and pressure. A modification of the ligand framework allows for the isolation and structural characterisation of a proposed metallacyclic Fe(II) carbene intermediate. These results indicate that, with the appropriate choice of supporting ligands, it is possible to cleave and homologate carbon monoxide under mild conditions using an abundant and environmentally benign low-coordinate, first row transition metal.
Publisher: American Chemical Society (ACS)
Date: 30-05-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6CC07243G
Abstract: Isocyanurates can be synthesised through the cyclotrimerisation of primary isocyanates catalysed by low-coordinate manganese( ii ) and iron( ii ) m -terphenyl complexes under mild conditions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT00471K
Abstract: Alkane elimination reactions afford magnesium and zinc 1,8-bis(triorganosilyl)diamidonaphthalene complexes, where the tuning of the reaction conditions and steric bulk allows manipulation of the coordination environment.
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Deborah Kays.