Oxidative addition chemistry of tetrathiocines: synthesis, structures and properties of group 10 dithiolate complexes

Abstract

Oxidative addition of the electron-rich tetra-methoxy-dibenzo-1,2,5,6-tetrathiocine [(MeO)₂C₆H₂S₂]₂ to zero-valent group 10 transition metal complexes in the presence of diphenylphosphinoethane (dppe) affords the corresponding dithiolate complexes, [(DMOBD)M(dppe)] (DMOBD = dimethoxybenzenedithiolato, (MeO)₂C₆H₂S₂²⁻; M = Ni, Pd, Pt) in high yield which were characterized by single crystal X-ray diffraction. Whereas the Pd and Pt complexes exhibit two quasi-reversible 1e⁻ oxidation processes, the nickel species undergoes a quasi-reversible 1e⁻ reduction.