Synthesis and structure of the platinum complex [Ph3PC6H11-cyclo][PtBr5(DMSO-S)]

Interaction of triphenylcyclohexylphosphonium bromide with potassium hexabromoplatinate (2:1, mol.) in acetone has produced the [Ph3PC6H11-cyclo]2[PtBr6] complex; its recrystallization from dimethyl sulfoxide has led to formation of the [Ph3PC6H11-cyclo] [PtBr5(DMSO-S)] complex. The phosphorus atom in the complex cation has tetrahedral coordination environment (the CPC angles and P-C distances equal 105.7(8)°-111.3(8)°and 1.77(2)-1.80(2) Å). In the octahedral anion [PtBr5(DMSO-S)]- the trans angles are: SPtBr 178.56(17)°, BrPtBr 178.32(8)°, 178.52(9)°, the distances equal: Pt-S 2.343(5), Pt-Br 2.443(2)-2.4674(16) Å.