Thiocarbonylphosphorane and arsorane ligands

Abstract

Independently unstable thiocarbonylphosphorane or arsorane ligands SCAR3 (A = P, As) are observed in the salts [W(η2-C,S-SCAR3)(CO)2(Tp*)]PF6 [AR3 = PCy3, PMenPh3-n: n = 0, 1, 2, AsMePh2; Tp* = tris(dimethylpyrazolyl)borate] which arise from the reactions of phosphonio- or arsoniocarbynes [W(≡CAR3)(CO)2(Tp*)]+ with sulfur.