Mono- and bi-nuclear gold(I) and gold(III) complexes with S2C–PR3 ligands. X-Ray crystal structures of [Au(C6F5)3(S2C–PEt3)] and [Au2(µ-S2C–PEt3)-(C6F5)6]·Ch2Cl2

Abstract

Phosphonium dithiocarboxylates S₂C–PR₃ displace the neutral ligand in [Au(C₆F₅)₃(tht)](tht = tetra-hydrothiophene) to give monomeric [Au(C₆F₅)₃(S₂C–PR₃)], where the neutral ligand is mono-dentate. Binuclear singly- or doubly- bridged gold(I) derivatives can be obtained by the reaction (2:1) between suitable gold(I) precursors and S₂C–PR₃. Binuclear bridged gold(III) complexes [Au₂(µ-S₂C–PR₃)(C₆F₅)₆] have been prepared by reaction of [Au(C₆F₅)₃(S₂C–PR₃)] with [Au(C₆F₅)₃(OEt₂)]. The structures of [Au(C₆F₅)₃(S₂C–PEt₃)] and [Au₂(µ-S₂C-PEt₃)(C₆F₅)₆]·CH₂Cl₂ have been established by X-ray crystallography.