Novel phosphonium-betaine ligands [SC(H)PPh3-C,S]– and [S(H)CC(PPh3)S-S,S′]– stabilised in rhodacarborane complexes

Abstract

Two novel phosphonium-betaine ligands [SC(H)PPh₃]^– and [S(H)CC(PPh₃)S]^– are stabilised in the twelve-vertex closo-type rhodacarborane complexes [3-{η²-SC(H)PPh₃}-3-(PPh₃)-3,1,2-RhC₂B₉H₁₁] and [2-{η²-S(H)CC(PPh₃)S}-2,1,7-RhC₂B₉H₁₁] which are characterised spectroscopically and by X-ray diffraction methods.