Bis(1,2,3-thiadiazole)s as Precursors in the Synthesis of Bis(alkynethiolate)gold(I) Derivatives



The cleavage of bis(1,2,3-thiadiazole)s in the presence of strong bases in situ gives bis(alkynethiolate)s, which provide bis(alkynethiolate)gold(I) derivatives with the general formula [Au2(S–C≡C–spacer–C≡C–S)L2] (L = monophosphanes; spacer = none, 1,4-C6H4, 1,3-C6H4, 2,7-C15H12 and 3,5-C7H7N). The dinuclear structure was confirmed by X-ray diffraction studies of the complexes (PPN)2[Au2(S–C≡C–C≡C–S)(C6F5)2] and [Au2{3,5-(S–C≡C)2–C7H7N}(PPh3)2] {PPN = bis(triphenylphosphane)iminium}. The use of diphosphanes gives complexes with higher nuclearity and cyclic structures.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)