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Gold(1) Complexes of Ketiminophosphanes and ‐phosphane Sulfides
Author(s) -
Schneider Wolfgang,
Bauer Andreas,
Schier Annette,
Schmidbaur Hubert
Publication year - 1997
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19971301011
Subject(s) - chemistry , sulfide , sulfur , metal , crystallography , crystal structure , molecule , intermolecular force , tris , stereochemistry , inorganic chemistry , medicinal chemistry , organic chemistry , biochemistry
The reactions of chloro(dimethyl sulfide)gold(I) with equivalent quantities of the ketiminophosphane diphenyl(diphenylmethyleneamino)phosphane ( 1a ) or its sulfide ( 1aS ) lead to high yields of stable, crystalline 1 : 1 complexes with AuCl units attached to the phosphorus and sulfur atom, respectively. Tris(diphenylmethyleneamino)phosphane ( 1c ) gives the related complex (Ph 2 CN) 3 PAuCl with the gold atom also selectively P ‐bound. Bis(diphenylmethyleneamino)phenyl‐phosphane ( 1b ) could not be used because of its limited stability. Single‐crystal X‐ray diffraction studies have shown that there is no auxiliary coordination of the metal center by the imino functions of the ligands. The geometry of the P/SAuCl moieties deviates only very slightly from linearity. The angle at the sulfur atom in (Ph 2 CN)Ph 2 PSAuCl is very small [94.30(3)°], but despite of the resulting rather open coordination there are no discernible intra‐ or intermolecular contacts in the lattice. Such contacts are also absent with (Ph 2 CN)Ph 2 PAuCl and (Ph 2 CN) 3 PAuCl owing to the bulk of the ligands. The 1 : 1 complexes do not react with an excess of (Me 2 S)AuCl. This finding, and the molecular structures of the 1 : 1 complexes, show very consistently that both phosphane and sulfide donors are far superior as ligands for gold(I) as compared to ketimine donor molecules.