ISSN:
0009-2940
Keywords:
Dimethylgold halides, complexes of
;
Bidentate phosphorus ligands
;
Bidentate arsenic ligands
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Dimethylgold(III) chloride and bromide, (Me2AuX)2, react with bis(diphenylphosphanyl)methane (dppm, molar ratio 1:2) to give the P-monohapto complexes cis-Me2AuX(dppm) (1a, b) in quantitative yields. The products are readily oxidized by air to yield the P-hapto P′-monoxides 2a, b. Treatment of 1a, b with AgNO3 affords an ionic nitrate [Me2Au(dppm)]2 [NO3-]2 (1c), which contains a dinuclear cation. A mixed bromide/nitrate (from 1b and half the equivalent amount of AgNO3) is thermally unstable and undergoes elimination of ethane to give an ionic tetranuclear gold(I) complex [(dppm)4Au4Br2]2+ [NO3-]2 (3b). - Treatment of (Me2AuCl)2 with CH2(AsPh2)2 (dpam, molar ratio 1:2) gives cis-Me2-AuCl(dpam) (1d), the arsenic analog of 1a, which is not sensitive to oxygen. - The reaction of bis(diphenylphosphanyl)-amine (dppa) yields 1:1 P-monohapto adducts Me2. AuX(dppa), which are in equilibrium with ionic chelated systems Me2Au(dppa)+ X- (1e, f). Complex 1e is readily oxidized by air to the P-hapto P′-monoxide cis complex 2e. Treatment of 1e with AgNO3 gives the ionic nitrate Me2. Au(dppa)+ NO3- (1g). - All compounds were identified by standard analytical and spectroscopic techniques. The crystal structures of 2a, 3b, 1d, and 2e were determined by single-crystal X-ray diffraction studies.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19961290116
