ORCID Profile
0000-0001-9361-3137
Current Organisations
Monash University
,
University of New South Wales
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Publisher: American Chemical Society (ACS)
Date: 16-01-2020
Publisher: American Chemical Society (ACS)
Date: 30-01-2020
Publisher: American Chemical Society (ACS)
Date: 06-03-2012
DOI: 10.1021/IC2027225
Abstract: Treatment of trans-[FeCl(2)(dmpe)(2)] with phenylhydrazine and 1 equiv of base afforded the side-on bound phenylhydrazido complex cis-[Fe(η(2)-NH(2)NPh)(dmpe)(2)](+). Further deprotonation of the phenylhydrazido complex afforded the side-on bound phenyldiazene complex cis-[Fe(η(2)-HN═NPh)(dmpe)(2)] as a mixture of diastereomers. Treatment of cis-[RuCl(2)(dmpe)(2)] with phenylhydrazine or methylhydrazine afforded the end-on bound phenylhydrazine or methylhydrazine complexes cis-[RuCl(η(1)-NH(2)NHR)(dmpe)(2)](+) (R = Ph, Me). Treatment of the substituted hydrazine complexes with base afforded the side-on bound phenylhydrazido complex cis-[Ru(η(2)-NH(2)NPh)(dmpe)(2)](+) as well as the phenyldiazene and methyldiazene complexes cis-[Ru(η(2)-HN═NR)(dmpe)(2)] (R = Ph, Me). cis-[RuCl(η(1)-NH(2)NHR)(dmpe)(2)](+) (R = Ph, Me), cis-[M(η(2)-NH(2)NPh)(dmpe)(2)](+) (M = Fe, Ru) and cis-[Ru(η(2)-HN═NPh)(dmpe)(2)] were characterized structurally by X-ray crystallography. cis-[Ru(η(2)-HN═NPh)(dmpe)(2)] is the first side-on bound phenyldiazene complex to be structurally characterized. In the structure of cis-[Ru(η(2)-HN═NPh)(dmpe)(2)], the geometry of the coordinated diazene fragment is significantly nonplanar (CNNH angle 137°) suggesting that the complex is probably better described as a Ru(II) metallodiaziridine than a Ru(0) diazene π-complex.
Publisher: Wiley
Date: 03-2019
Publisher: American Chemical Society (ACS)
Date: 27-05-2011
DOI: 10.1021/IC102519F
Abstract: Treatment of trans-[MHCl(dmpe)(2)] (M = Fe, Ru) with hydrazine afforded the hydrido hydrazine complexes cis- and trans-[MH(N(2)H(4))(dmpe)(2)](+) which have been characterized by NMR spectroscopy ((1)H, (31)P, and (15)N). Both cis and trans isomers of the Fe complex and the trans isomer of the Ru complex were characterized by X-ray crystallography. Reactions with acid and base afforded a range of N(2)H(x) complexes, including several unstable hydrido hydrazido complexes.
Publisher: Wiley
Date: 22-08-2003
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8AN01558A
Abstract: ATR-FTIR spectroscopy has been applied to compare the effect of new organoamidoplatinum( ii ) complexes with cisplatin on cells from a cisplatin-sensitive and a cisplatin-resistant ovarian cancer cell line.
Publisher: CSIRO Publishing
Date: 2004
DOI: 10.1071/CH04032
Abstract: The cationic Rh(I) dicarbonyl complex [{Rh(bim)(CO)2}+BPh4–] 1, containing a bidentate bisimidazolylmethane ligand [bim refers to bis(N-methylimidazol-2-yl)methane] acts as a catalyst for the cyclization of alkynyl amides to produce lactams and N-acyl heterocyclic compounds.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9DT04856A
Abstract: A series of dinuclear acetylide-bridged ruthenium complexes with rigid linkers 1,4-bicyclooctane and 1,12- p -carborane was synthesised and the metal-to-metal communication through the bridge was explored using cyclic voltammetry.
Publisher: American Chemical Society (ACS)
Date: 17-01-2019
DOI: 10.1021/ACS.INORGCHEM.8B02850
Abstract: The ruthenium(0) dinitrogen complexes [Ru(N
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B802039F
Abstract: The side-on bound metal complex of diazene cis-[Fe(NH[double bond]NH)(dmpe)(2)] was synthesised by reaction of [Fe(dmpe)(2)Cl(2)] with hydrazine in the presence of potassium graphite and characterised by (15)N NMR spectroscopy and X-ray crystallography.
Publisher: Royal Society of Chemistry (RSC)
Date: 2004
DOI: 10.1039/B401954G
Abstract: The dihydrogen hydrido complex [FeH(H2)(PP3)]+ 1 (PP3 = P(CH2CH2PMe2)3 2) was formed by the protonation of the dihydrido complex FeH2(PP3) 3 with methanol or ethanol. The observation of H-D coupling in partially deuterated isotopomers of 1 and measurement of T1 relaxation times for the hydrido and dihydrogen resonances of 1 confirmed the presence of the eta2-dihydrogen ligand. Complex 1 shows dynamic NMR behaviour in both the 31P and 1H NMR spectra with facile exchange between the protons in the eta2-dihydrogen ligand and the eta1-hydrido ligand. The dihydrogen ligand of 1 is easily displaced by both anionic and neutral ligands to afford the corresponding hydrido complexes [FeHX(PP3)]+ (X = CO 11, X = PPh3 12) or FeHX(PP3)(X = Cl 13, X = Br 14, X = I 15, X = N3 16). Small quantities of the alkoxy hydrido complexes FeH(OR)(PP3)(R = Me 4 R = Et 5) are observed in methanol and ethanol solutions containing 1. In methanol solution, FeH(OMe)(PP3) 4 reacts to form the carbonyl hydrido complex [FeH(CO)(PP3)]+ 11 and isotopic labelling confirms that the carbonyl ligand of 11 is derived from the methanol solvent. The mechanism of methanol oxidation presumably proceeds through beta-hydride elimination from FeH(OMe)(PP3) to produce formaldehyde as an intermediate which is further dehydrogenated to form the carbonyl ligand. [FeH(H2)(PP3)]+ 1 and FeHCl(PP3) 13 react rapidly with paraformaldehyde to also form [FeH(CO)(PP3)]+ 11. Complex 11 also decarbonylates acetaldehyde to afford the methyl carbonyl complex [FeMe(CO)(PP3)]+ 17. The structure of 17 was confirmed by X-ray crystallography.
Publisher: American Chemical Society (ACS)
Date: 23-04-2020
Publisher: Wiley
Date: 04-08-0012
DOI: 10.1002/MRC.1247
Publisher: American Chemical Society (ACS)
Date: 22-01-2013
DOI: 10.1021/IC302449N
Abstract: Treatment of [RuCl(PP(3)(iPr))](+)Cl(-) (PP(3)(iPr) = P(CH(2)CH(2)P(i)Pr(2))(3)) with hydrazine, phenylhydrazine, and methylhydrazine afforded side-on bound hydrazine complexes [RuCl(η(2)-H(2)N-NH(2))(η(3)-PP(3)(iPr))](+), [RuCl(η(2)-H(2)N-NHPh)(η(3)-PP(3)(iPr))](+), and [RuCl(η(2)-H(2)N-NHMe)(η(3)-PP(3)(iPr))](+). The analogous reactions of [RuCl(2)(PP(3)(Ph))] (PP(3)(Ph) = P(CH(2)CH(2)PPh(2))(3)) with hydrazine, phenylhydrazine, and methylhydrazine afforded end-on bound hydrazine complexes [RuCl(η(1)-H(2)N-NH(2))(PP(3)(Ph))](+), [RuCl(η(1)-H(2)N-NHPh)(PP(3)(Ph))](+), and [RuCl(η(1)-H(2)N-NHMe)(PP(3)(Ph))](+). Treatment of parent hydrazine complex [RuCl(N(2)H(4))(PP(3)(iPr))](+) with strong base afforded the dinitrogen and dihydride complexes [Ru(N(2))(PP(3)(iPr))] and [RuH(2)(PP(3)(iPr))]. Treatment of phenylhydrazine complex [RuCl(NH(2)NHPh)(PP(3)(iPr))](+) with strong base afforded the hydrido ruthenaindazole complex [RuH(η(2)-NH═NC(6)H(4))(η(3)-PP(3)(iPr))] while similar treatment of methylhydrazine complex [RuCl(NH(2)NHMe)(PP(3)(iPr))](+) afforded the hydrido methylenehydrazide complex [RuH(NHN═CH(2))(PP(3)(iPr))]. Treatment of the hydrazine complexes [RuCl(NH(2)NHR)(PP(3)(Ph))](+) (R = H, Ph, Me) with strong base afforded the dinitrogen complex [Ru(N(2))(PP(3)(Ph))].
Publisher: American Chemical Society (ACS)
Date: 06-05-2015
DOI: 10.1021/ACS.INORGCHEM.5B00211
Abstract: A reinvestigation of the treatment of [Fe(N2)(PP)2] (PP = depe, dmpe) with acid revealed no ammonium formation. Instead, rapid protonation at the metal center to give hydride complexes was observed. Treatment of [Fe(N2)(dmpe)2] with methylating agents such as methyl triflate or methyl tosylate resulted in methylation of the metal center to afford [FeMe(N2)(dmpe)2](+). Treatment of [Fe(N2)(dmpe)2] with trimethylsilyl triflate, however, resulted in reaction at dinitrogen affording NH4(+) on subsequent treatment with acid. The side-on bound hydrazine complex [Fe(N2H4)(dmpe)2](2+) and bis(ammonia) complex [Fe(NH3)2(dmpe)2](2+) were identified by (15)N NMR spectroscopy as other species formed in the reaction mixture.
Publisher: American Chemical Society (ACS)
Date: 12-2008
DOI: 10.1021/IC801856Q
Abstract: The treatment of the hydrazine complex cis-[Fe(N(2)H(4))(dmpe)(2)](2+) with base afforded the diazene complex cis-[Fe(N(2)H(2))(dmpe)(2)]. This reaction is reversed by the treatment of the diazene complex with a mild acid, while treatment of the hydrazine complex with a mixture of KOBu(t) and Bu(t)Li afforded the dinitrogen complex [Fe(N(2))(dmpe)(2)].
Publisher: American Chemical Society (ACS)
Date: 10-06-2010
DOI: 10.1021/IC100821U
Abstract: The reaction of cis-[RuCl(2)(PP)(2)] (PP = depe, dmpe) with hydrazine afforded end-on bound ruthenium(II) hydrazine complexes. Treatment of the hydrazine complexes with strong base afforded the side-on bound ruthenium(0) diazene complexes cis-[Ru(eta(2)-NH=NH)(PP)(2)]. Treatment of cis-[Ru(eta(2)-NH=NH)(depe)(2)] with weak acid under chloride-free conditions afforded the side-on bound hydrazine complex cis-[Ru(eta(2)-N(2)H(4))(depe)(2)](2+). These are the first reported side-on bound diazene and hydrazine complexes of ruthenium, and they have been characterized by NMR spectroscopy ((1)H, (31)P, (15)N) and by X-ray crystallography. The interconversion between the ruthenium diazene and the ruthenium hydrazine by acid-base treatment was reversible.
No related grants have been discovered for Hsiu Li.