Self-Assembly of Gold(I) Compounds with (Aza-15-crown-5)dithiocarbamate and 2-Mercapto-4-methyl-5-thiazoleacetic Acid

Abstract

Treatment of AuCl(SMe2) with equimolar sodium (aza-15-crown-5)dithiocarbamate (O4NCS2) or 2-mercapto-4-methyl-5-thiazoleacetic acid (HSSCOOH) in the presence of NaOMe affords a dinuclear complex, [Au(O4NCS2)]2 1, and a tetranuclear complex, [Au(SSCOOH)]4 2, respectively. 1 features a dinuclear structure containing two azacrown ether rings, and there is a short intramolecular gold(I)···gold(I) distance of 2.7820(5) A. Importantly, 2 crystallizes in two forms: 2·4THF and 2·4DMF, where the solvent molecules are hydrogen-bonded to the carboxylic acid moiety of SSCOOH. 2·4THF and 2·4DMF are tetranuclear complexes featuring an interesting double-clipped structure built from both thiazole rings and carboxylic acid moieties. The four gold(I) centers in 2 form a pucker-squared channel with four equivalent gold(I)···gold(I) distances of 3.0478(4) A for 2·4THF and 3.0423(4) A for 2·4DMF, respectively, and this one-dimensional channel structure may be rationalized by π···π interactions and/or weak intermolecular Au··...