(Thio)(silyl)carbene and (seleno)(silyl)carbene gold(i) complexes from the reaction of bis(methylene)-lambda(4)-sulfane and bis(methylene)-lambda(4)-selane with chloro(dimethylsulfide)gold(i)

摘要

The dinuclear (thio)(silyl)carbene and (seleno)(silyl)carbene gold(i) complexes1and2were obtained from the reaction of two equivalents of AuCl(SMe2) with the stable bis(methylene)-lambda(4)-chalcogenanes3and4, respectively. The reaction proceeds under elimination of the chlorosilane moiety of3and4. Complexes1and2were characterized by spectroscopic and X-ray diffraction (XRD) analyses. The(13)C NMR signals for the carbene centers of 1 (309 ppm) and 2 (345 ppm) are by more than 150 ppm downfield shifted relative to those for other known (NHC)AuCl complexes. These results indicate that (chalcogeno)(silyl)carbenes, like (amino)(silyl)carbenes, belong to the push-spectator family of carbenes.