Sugamata Koh, Urao Yukiko, Minoura Mao
College of Science, Department of Chemistry, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan.
Dalton Trans. 2020 Jun 21;49(23):7688-7691. doi: 10.1039/d0dt00967a. Epub 2020 Jun 2.
The dinuclear (thio)(silyl)carbene and (seleno)(silyl)carbene gold(i) complexes 1 and 2 were obtained from the reaction of two equivalents of AuCl(SMe) with the stable bis(methylene)-λ-chalcogenanes 3 and 4, respectively. The reaction proceeds under elimination of the chlorosilane moiety of 3 and 4. Complexes 1 and 2 were characterized by spectroscopic and X-ray diffraction (XRD) analyses. The 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.
双核（硫代）（硅基）卡宾和（硒代）（硅基）卡宾金（I）配合物1和2分别通过两当量的AuCl（SMe）与稳定的双（亚甲基）-λ-硫属元素烷3和4反应得到。该反应在消除3和4的氯硅烷基部分的情况下进行。配合物1和2通过光谱和X射线衍射（XRD）分析进行了表征。1（309 ppm）和2（345 ppm）卡宾中心的碳核磁共振信号相对于其他已知的（NHC）AuCl配合物的信号向低场位移了超过150 ppm。这些结果表明，（硫属元素）（硅基）卡宾与（氨基）（硅基）卡宾一样，属于推-旁观型卡宾家族。
