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 [Au 2 (S–C≡C–spacer–C≡C–S)L 2 ] (L = monophosphanes; spacer = none, 1,4‐C 6 H 4 , 1,3‐C 6 H 4 , 2,7‐C 15 H 12 and 3,5‐C 7 H 7 N). The dinuclear structure was confirmed by X‐ray diffraction studies of the complexes (PPN) 2 [Au 2 (S–C≡C–C≡C–S)(C 6 F 5 ) 2 ] and [Au 2 {3,5‐(S–C≡C) 2 –C 7 H 7 N}(PPh 3 ) 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)