Synthesis and structural chemistry of metallo-xanthate anions (M = Zn, Sn, Bi)

The structures of the metallo-xanthate anions [Zn(S2COR)3]− (R = Et (1), Pri (2)), [Sn(S2COR)3]− (R = Et (3), Pri (4)), and [Bi(S2COPri)4]− (5) have been determined as their [Me4N]+ salts. The two zinc species differ in having either all S,S bonded ligands (1) or both S,S and S,O-ligation (2). The tin compounds are either monomeric (4) or weakly associated into dimers (3), while 5 adopts a monomeric dodecahedral structure.