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
Organoarsenic nucleophiles were easily and safely prepared, leading to a practical method for As–C bond formation. Promising ligand structures such as asymmetric and bidentate types can be widely constructed by the present method.
intermolecular aurophilic interactions depending on the ligand structure except for dpab. Crystal polymorphs of Au2Cl2(dpae) and Au2Cl2(dpap) were observed because of the flexible alkylene linkers of the diarsine ligand. The emission behaviors of the complexes were drastically changed by the ligands, which should affect the energy barrier for internal conversion from the intraligand excitation state to the
Gold(I) complexes of unidentate and bidentate phosphorus-, arsenic-, antimony-, and sulphur-donor ligands
作者:Charles A. McAuliffe、R. V. (Dick) Parish、P. David Randall
DOI:10.1039/dt9790001730
日期:——
Complexes of gold(I) with a variety of unidentate and potentially chelating P-, As-, Sb-, and S-donor ligands have been characterised by analysis, 1H n.m.r., i.r., and u.v.–visible spectroscopy, and electrical conductivity. In the majority of cases, the gold atom is two co-ordinate, [AuX(L)] or [XAu(L′–L′)AuX](L = unidentateligand, L′–L′= bidentateligand, X = Cl, Br, or SCN), but a few examples of
Co-ordination chemistry of higher oxidation states. Part 22. trans-Dioxo-osmium(VI) complexes of diamines, diphosphines, and diarsines
作者:Stephen K. Harbron、William Levason
DOI:10.1039/dt9870000633
日期:——
at low temperatures produce the dioxo-osmium(VI) complexes [OsO2Cl2L2](L = AsEt3, AsMe2Ph, or AsPh3) and [OsO2Cl2(L–L)][L–L =o-C6H4(AsMe2)2,o-C6H4(AsPh2)2, Ph2AsCH2CH2AsPh2, or Ph2AsCHCHAsPh2]. The corresponding reactions at higher temperatures lead to mixtures containing OsVI complexes and chloro complexes of OsIII and OsIV. The diphosphine complexes [OsO2Cl2(L–L)][L–L =o-C6H4(PMe2)2, Me2PCH2 CH2PMe2