Synthesis and properties of alkynethiolate gold(i) complexes

Abstract

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–CC–S)PPh₃], [Au(3-C₄H₃S–CC–S)PPh₃] and PPN[Au(p-CH₃–C₆H₄–CC–S)(C₆F₅)] by X-ray analysis. The electrochemically polymerizable mononuclear bis(alkynethiolate) gold(I) complex PPN[Au(3-C₄H₃S–CC–S)₂] is also described, including its electropolymerization and electrochemical properties.