Mono-, bi- and tri-nuclear bis(diphenylphosphino)methane gold complexes. Crystal and molecular structures of [bis(diphenylphosphino)methane]bis(pentafluorophenyl)gold(III) perchlorate and 1,2; 2,3-di-µ-[bis(diphenylphosphino)methane]-1,3-dichlorotrigold(I) chlorotris(pentafluorophenyl)aurate(III)
- Usón, R. 2
- Laguna, A. 2
- Laguna, M. 2
- Fernandez, E. 2
- Villacampa, M.D. 2
- Jones, P.G. 1
- Sheldrick, G.M. 1
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1
University of Göttingen
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2
Universidad de Zaragoza
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ISSN: 0300-9246
Año de publicación: 1983
Volumen: 8
Páginas: 1679-1685
Tipo: Artículo
Otras publicaciones en: Journal of the Chemical Society-Dalton Transactions
Resumen
Reactions of gold(III) complexes of the types [AuClR 2(dppm)] and [AuR 3(dppm)] (R = C 6F 5, dppm = bis(diphenylphosphino)methane] with other gold complexes, such as [Au(O 3ClO)(PPh 3)], [Au(C 6F 5)(tht)], [AuCl(tht)], or [AuCl 3(tht)] (tht = tetrahydrothiophene) which contain a readily displaceable ligand (O 3ClO - or tht), lead to the formation of cationic binuclear complexes of the types [R 2ClAu(dppm)Au(PPh 3)]ClO 4 and [R 3Au(dppm)Au(PPh 3)]ClO 4 or of neutral ones [R 2ClAu(dppm)AuX] and [R 3Au(dppm)AuX] (R = C 6F 5, X = Cl or C 6F 5). Reaction of [AuClR 2(dppm)] with AgClO 4 gives [AuR 2(dppm)]ClO 4 which has been structurally identified by X-ray crystallography. The crystals are orthorhombic, space group Pnma, with a = 17.204(4), b = 20.053(4), c = 11.348(2) Å, Z = 4, and R = 0.065 for 3 401 unique observed reflections. Oxidation of [XAu(dppm)AuX] (X = Cl or C 6F 5) with [TlClR 2] or TlCl 3 leads to the cationic trinuclear complex [ClAu(dppm)Au(dppm)AuCl] [AuClR 3], whose crystal structure has also been determined: space group P1̄, with a = 12.170(6), b = 14.448(8), c = 23.780(10) Å, α = 101.29(5), β = 90.01 (4), γ = 93.68(4)°, Z = 2, and R = 0.085 for 4 891 unique observed reflections. The cation shows short Au ⋯ Au contacts (ca. 3.1 Å).