Synthesis of trinuclear gold(I) and gold(III) complexes containing the tridentate bis(diphenylphosphino)methanide ligand. Crystal structure of [Cl(C6F5)2Au{Ph2PCH(AuNC5H5)PPh2}AuCl]

Abstract

The reaction of [Au(C₆F₅)₂(Ph₂PCHPPh₂)] with [AuX(L)][X = Cl or Br, L = tetrahydrothiophen (tht) or AsPh₃] leads to trinuclear complexes [X(C₆F₅)₂Au{Ph₂PCH (AuL) PPh₂}AuX] containing the tridentate [Ph₂PCH PPh₂]^– ligand. Displacement of tht with L = PPh₃, pyridine, or 4-methylpyridine leads to the corresponding derivatives. The structure of [Cl(C₆F₅)₂Au{Ph₂PCH (AuNC₅H₅) PPh₂}AuCl] has been determined by X-ray diffraction: space group P, a=11.664(5), b=14.790(6), c= 18.344(6)Å, α=111.30(4), β= 94.1 8(4), γ=107.64(4)°, and Z= 2; R= 0.075 for 4 627 reflections.