Gold and silver derivatives with the carborane-selenolate ligand [B10H11C2Se]-

Article abstract of DOI:10.1039/b310658f

The carborane-selenol [(B₁₀H₁₁C₂)SeH] has been isolated and its anion employed as a ligand. Reaction of the ligand with [AuClL] (L = PPh₃, AsPh₃) (1 : 1 molar ratio) or PPN[AuCl₂] (PPN = N(PPh₃)₂) (2 : 1 molar ratio) affords the mononuclear compounds [Au(SeC₂ B₁₀H₁₁)L] or PPN[Au(SeC₂B₁₀H₁₁)₂], respectively. Dinuclear derivatives [Au₂(SeC₂B₁₀ H₁₁)₂(μ-PP)] (PP = 1,1′-bis(diphenylphosphino) ferrocene (dppf), 1,2-bis(diphenylphosphino)ethane (dppe)) are synthesised by reaction of the ligand with [Au₂Cl₂(μ-PP)] or by reaction of [Au(SeC₂B₁₀H₁₁)-(AsPh₃)] with the bidentate ligand. The selenolate acts in a bridging mode in [M₂(μ-SeC₂B₁₀H₁₁) (PPh₃)₂]X₂ (M = Au, X = ClO₄; M = Ag, X = TfO), obtained by treatment of the ligand with [O{Au(PPh₃)}₃]ClO₄ or by reaction with [Ag(TfO)(PPh₃)] in 1 : 2 molar ratio, respectively. The crystal structure of [Au(SeC₂B₁₀H₁₁)(PPh₃)] has been determined by X-ray diffraction studies.