Synthesis and properties of alkynethiolate gold(I) complexes

A series of alkynethiolate gold(I) derivatives have been synthesised by the cleavage of 4-monosubstituted 1,2,3-thiadiazoles in the presence of strong bases. The syntheses of the 1.2,3-thiadiazoles with p-cyanophenyl, p-tolyl, 2-thienyl, 3-thienyl and 9,9-dimethylfluoren-2-yl fragments are also described. All the complexes have been characterised by spectroscopic techniques and the complexes Au(p-CH3-C6H4-Ctriple bond]C-S)PPh3], Au(3-C4H3S-Ctriple bond]C-S)PPh3] and PPNAu(p-CH3-C6H4-Ctriple bond]C-S)(C6F5)] by X-ray analysis. The electrochemically polymerizable mononuclear bis(alkynethiolate) gold(I) complex PPNAu(3-C4H3S-Ctriple bond]C-S)2] is also described, including its electropolymerization and electrochemical properties.