Silver complexes with the nido-diphosphine [7,8-(PPh2)2-7,8-C2B9H10]–

Abstract

Silver complexes with the nido-diphosphine [7,8-(PPh₂)₂-7,8-C₂B₉H₁₀]^– have been synthesized. Reaction of [Ag(OClO₃)(PR₃)] with (PPh₂)₂C₂B₁₀H₁₀ in refluxing ethanol affords the three-co-ordinate complexes [Ag{(PPh₂)₂C₂B₉H₁₀}(PR₃)](PR₃= PPh₃1 or PPh₂Me 2), whereas treatment of [Ag(OClO₃){(PPh₂)₂C₂B₁₀H₁₀}] with L–L under the same conditions leads to the formation of [Ag{(PPh₂)₂C₂B₉H₁₀}(L–L)][L–L = 1,10-phenanthroline 3, bis(diphenylthiophosphoryl)methane 4 or 1,2-bis(diphenylphosphino)-1,2-dicarbadodecaborane(10)5]. The structures of complexes 1, 3 and 5 have been established by X-ray crystallography. The silver atoms show a trigonal planar (1) or tetrahedral geometry (3 and 5).