A. Cervilla et al., CRYSTAL-STRUCTURE AND OXO-TRANSFER PROPERTIES OF [NH4](2)[W(VI)O2(O2CC(S)PH(2))(2)], Journal of the Chemical Society. Dalton transactions, (23), 1994, pp. 3511-3513
The complex [NH4](2)[(WO2)-O-VI{O2CC(S)Ph(2)}(2)] is the first example
of a non-dithiolene tungsten complex capable of oxidising benzoin to
benzil in methanol; the reduced complex product formed, presumably a m
onomeric (WO)-O-IV species, was reoxidised with nitrate ions, regenera
ting the starting (WO2)-O-VI complex which then acts as a true homogen
eous catalyst.