Synthesis of dithiolate gold(III) complexes by dithiolate transfer reactions. X-ray structure of [Au(C 6F 5)(S 2C 6H 4)(PPh 3)

Abstract

The reaction of ethanolic solutions of Na 2(SS) {SS &.dbnd; 1,2-S 2C 6H 4 or 3,4-S 2C 6H 3(CH 3)} with [Sn(CH 3) 2Cl 2] or (PPN) 2[ZnCl 4] gives [Sn(CH 3) 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(CH 3) 2(dmit)], is obtained by reaction of [Sn(CH 3) 2Cl 2] with (NEt 4) 2[Zn(dmit) 2]. The tin and zinc complexes further react with the gold(III) derivatives cis-[Au(C 6F 5)Cl 2L] giving rise to dithiolate gold(III) complexes [Au(C 6F 5)(SS)L]. The structure of [Au(C 6F 5)(S 2C 6H 4)(PPh 3)] has been established by an X-ray diffraction study, and shows a square-planar coordination of the gold with the dithiolate chelating.