Dinuclear gold(I) dithiophosphonate complexes: formation, structure and reactivity

Abstract

2,4-Diaryl- and 2,4-diferrocenyl-1,3-dithiaphosphetane disulfide dimers ( 1a–1c) react with a variety of alcohols, silanols and trialkylsilylalcohols to form dithiophosphonic acids in a facile manner. Their corresponding salts react with chlorogold(I) complexes to produce the first dinuclear gold(I) dithiophosphonate complexes of the type [AuS 2PR(OR′)] 2 (R=Ph, R′=Et ( 2); R= p-C 6H 4OMe, R′=SiPh 3) ( 3)) in high yield (>70%). The dinuclear gold(I) complexes react with dppm (Ph 2PCH 2PPh 2) or dppa (Ph 2PNHPPh 2) to form new heterobridged dinuclear gold(I) complexes of the type [Au 2(dppm)S 2P(O)R] (R=Ph ( 4)). Moreover, 1a–1c react with Au 2(dppm)Cl 2 to form new heterobridged trithiophosphonate gold(I) complexes of the type [Au 2(dppm)S 2P(S)R] (R=ferrocenyl ( 5)).