trans-[RuIICl(MeCN)5][RuIIICl4(MeCN)2]: A Reactive Intermediate in the Homogeneous Catalyzed Hydrosilylation of Carbon Dioxide
摘要:
RuCl3.nH(2)O in MeCN catalyzes the hydrosilylation of carbon dioxide with n-Hex(3)SiH into n-Hex(3)SiOOCH and, with Me2PhSiH, into Me2PhSiOOCH. The initial catalyst formed is trans-[(RuCl)-Cl-II(MeCN)(5)][(RuCl4)-Cl-III(MeCN)(2)], the synthesis and structural characterization of which are described. With [(RuCl)-Cl-II(MeCN)(5)][(RuCl4)-Cl-III(MeCN)(2)] as a catalyst, Me2PhSiOOCH is produced at 313 K. Analogously, Et2SiH2, Ph2SiH2, and p-C6H4-(Me2SiH)(2) yield Et2Si(OOCH)(2), Ph2Si(OOCH)(2), and p-C6H4-(Me2SiOOCH)(2), respectively. When exposed to air, the latter compounds hydrolyze spontaneously into mixtures of silanediols, linear siloxane oligomers,and polymers, and cyclic siloxane oligomers with the release of formic acid.