Solvent influence on the thermodynamics for hydride transfer from bis(diphosphine) complexes of nickel
作者:Samantha J. Connelly Robinson、Christopher M. Zall、Deanna L. Miller、John C. Linehan、Aaron M. Appel
DOI:10.1039/c6dt00309e
日期:——
metal hydride and CO2 to produce formate. Because the hydricities of these species do not vary consistently between solvents, reactions that are thermodynamically unfavourable in one solvent can be favourable in others. The hydricity of a water-soluble, bis-phosphine nickel hydride complex was compared to the hydricity of formate in water and in acetonitrile. Formate is a better hydride donor than [HNi(dmpe)2]+
Synthesis and solution multinuclear nuclear magnetic resonance studies of homoleptic copper(I) complexes of Group 15 donor ligands
作者:Jane R. Black、William Levason、Mark D. Spicer、Michael Webster
DOI:10.1039/dt9930003129
日期:——
spectra, have been recorded from CH2Cl2 solutions of the complexes over the temperature range 300–175 K, including the first reported 63Cu resonances from arsenic and antimony donor ligand compounds. The effects of ligand size and geometry upon the 63Cu NMR spectra are discussed and typical copper chemical-shift ranges for Group 15 donor ligand compounds established. The structure of [Cu(cis-Ph2AsCHCHAsPh2)2]PF6
MULTINUCLEAR COMPLEX AND CONDENSATION PRODUCT THEREOF
申请人:Sugahara Yoshiyuki
公开号:US20090036687A1
公开(公告)日:2009-02-05
A multinuclear complex comprising a plurality of metal atoms and a ligand L coordinating to the metal atoms, and satisfying the following conditions (i), (ii), (iii) and (iv):
(i) The ligand L has a monovalent group represented by the following general formula (1) and/or a divalent group represented by the following general formula (2),
(ii) The ligand L has at least 5 coordination atoms bonding to the metal atom,
(iii) At least one of the coordination atoms bonds to two of the metal atoms, or the minimum number of covalent bonds between any two selected coordination atoms is 1-5, and
(iv) The ligand L is soluble in the solvent.
Eight coordinate 1,2-bis(dimethylarsino) and 1,2-bis(dimethylphosphino)-benzene complexes of uranium tetrachloride, UCl4[(1,2-Me2E)2C6H4]2 where E is As or P
作者:Sergio S. Rozenel、Peter G. Edwards、Mark A. Petrie、Richard A. Andersen
DOI:10.1016/j.poly.2016.04.024
日期:2016.9
uranium crystallize in the tetragonal crystal system in space group I 4 ¯ 2m, in which the geometry is a D2d-dodecahedron. In solution the uranium complexes do not exchange with added free ligand on the NMR time scale but they undergo bidentate ligand exchange on the chemical time scale. The 31P1H} NMRchemical shifts of UI4(diphos)2 and UX4(dmpe)2, X = Cl, Br, I range from 1500 to 2100 ppm and are strongly
Tertiary Phosphine and Arsine Complexes of Phosphorus Pentafluoride: Synthesis, Properties, and Electronic Structures
作者:John M. Dyke、James W. Emsley、Victoria K. Greenacre、William Levason、Francesco M. Monzittu、Gillian Reid、Giuseppina De Luca
DOI:10.1021/acs.inorgchem.9b03630
日期:2020.4.6
determined crystallographically are the only species present for [PF5(PMe3)] and [PF4o-C6H4(PMe2)2}][PF6] but that [PF5(PPh3)] and [PF4o-C6H4(PPh2)2}][PF6] exhibit reversible dissociation of the phosphine at ambient temperatures, although exchange slows at low temperatures. The complex 19F1H} and 31P1H} NMR spectra have been analyzed, including those of the cation [PF4o-C6H4(PMe2)2}]+, which is
PMe 3或PPh 3与PF 5在无水CH 2 Cl 2或己烷中的反应形成白色的对湿气敏感的络合物[PF 5(PR 3)](R = Me,Ph)。涉及二膦基o -C 6 H 4(PR 2)2的类似反应提供了配合物[PF 4 o -C 6 H 4(PR 2)2 }] [PF 6 ]。[PF 5(PR 3)]和[PF 4的X射线结构 o -C 6 H 4(PMe 2)2 }] [PF 6 ]显示伪八面体氟磷中心。多核NMR光谱(1 H,19 F 1 H},31 P 1 H})显示,在CH 2 Cl 2 / CD 2 Cl 2溶液中,通过晶体学确定的结构是[PF 5(PMe 3)]和[PF 4 o -C 6 H 4(PMe 2)2 }] [PF 6 ],但[PF 5(PPh 3)]和[PF 4 o -C 6 H 4(PPh 2)2 }] [PF 6 ]在环境温度下显示出可逆