SYNTHESIS OF DITHIOLATE GOLD(III) COMPLEXES BY DITHIOLATE TRANSFER-REACTIONS - X-RAY STRUCTURE OF [AU(C6F5)(S2C6H4)(PPH(3))]

The reaction of ethanolic solutions of Na-2(S-S) {S-S=1,2-S2C6H4 or 3,4-S2C6H3(CH3)} with [Sn(CH3)(2)Cl-2] or (PPN)(2)[ZnCl4] gives [Sn(CH3)(2)(S-S)] and (PPN)(2)[Zn(S-S)(2)], respectively. The tin derivative with 1,3-dithiol-2-thione-4,5-dithiolate (dmit), [Sn(CH3)(2)(dmit)], is obtained by reaction of [Sn(CH3)(2)Cl-2] with (NEt(4))(2)[Zn(dmit)(2)]. The tin and zinc complexes further react with the gold(III) derivatives cis-[Au(C6F5)Cl(2)L] giving rise to dithiolate gold(III) complexes [Au(C6F5)(S-S)L]. The structure of [Au(C6F5)(S2C6H4)(PPh(3))] has been established by an X-ray diffraction study, and shows a square-planar coordination of the gold with the dithiolate chelating.