Gold complexes with mono- or di-chalcogenides of bis(diphenylphosphino)methanide ligands. X-ray crystal structure of [Au(C6F5)2{(SPPh2) 2C(AuAsPh3)2}]ClO4

Article abstract of DOI:10.1016/S0277-5387(97)00473-7

The reaction between the chalcogenide derivatives [Au(C₆F₅)₃(PPh₂CH ₂PPh₂E)] (E = S, O) and [Au(acac)PPh₃] or [Au(TfO)PPh₃] leads to the dinuclear compounds [Au(C₆F₅)₃{PPh₂CH(AuPPh ₃)PPh₂E}] (E = S, O) or [Au(C₆F₅)₃{PPh₂CH ₂PPh₂(SAuPPh₃)}], respectively. When the phosphine disulphide complex [Au(C₆F₅)₃(SPPh₂CH ₂PPh₂S)] is employed, the reaction with [Au(acac)PPh₃] promotes the double substitution of the methylenic protons. The reaction of [Au(acac)L] (L = PPh₃, AsPh₃) with the six-membered auracycle [Au(C₆F₅)2{(SPPh₂)₂CH ₂}]ClO₄ leads to the double substitution of both methylenic protons by [AuL]⁺ fragments, keeping the auracycle intact. The crystal structure of one such product, [Au(C₆F₅)₂{(SPPh₂) ₂C(AuAsPh₃)₂}]ClO₄ has been established by X-ray diffraction studies. Starting from the methanide derivative [Au(C₆F₅)₂(SPPh₂CHPPh ₂S)], the reaction with [Au(acac)PPh₃] leads to the synthesis of the four-membered ring methanide [Au(C₆F₅)₂{SPPh₂C(AuPPh ₃)PPh₂S}]