Complexes of platinum group metals with the ambidentate ligands Ph2P(CF2)nSPh (n = 1, 2)

Abstract

The potentially bidentate ligands Ph2P(CH2)nSPh (n = 1, 2) form complexes of rhodium(I), iridium(I), palladium(II), or platinum(II) in which ligands are coordinated to a metal centre either by the phosphine function alone, or by the phosphine and thioether functions, or both. Successive displacement of chloro-ligands from [MCl2(Ph2PCH2CH2SPh)2] (M = Pd, Pt) gives the cationic complexes (MCl(Ph2PCH2CH2SPh)2]+ and [M(Ph2PCH2CH2SPh)2]2+. In the latter each ligand is chelating, but in the former, one ligand is monodentate and the other bidentate. Homopolynuclear complexes may also be synthesized in which metal centres are bridged by Ph2P(CH2)nSPh. The complex [RhCl(Ph2PCH2SPh)(C8H12)] contains cyclooctadiene as a monodentate ligand.