Coordination chemistry of dimethylgold halides with bidentate phosphorus and arsenic ligands - revisited

Martin Paul, Hubert Schmidbaur

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

21 Zitate (Scopus)

Abstract

Dimethylgold(III) chloride and bromide, (Me2AuX)2, react with bisfdiphenylphosphanyljmethane (dppm, molar ratio 1:2) to give the P-rnonohapto complexes cis-Me2AuX(dppm) (1a, to) 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 cJs-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 Me2AuX(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 le 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.

OriginalspracheEnglisch
Seiten (von - bis)77-83
Seitenumfang7
FachzeitschriftChemische Berichte
Jahrgang129
Ausgabenummer1
DOIs
PublikationsstatusVeröffentlicht - 1996
Extern publiziertJa

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