作者:M. Ballestri、C. Chatgilialoglu、K. B. Clark、D. Griller、B. Giese、B. Kopping
DOI:10.1021/jo00002a035
日期:1991.1
Tris(trimethylsilyl)silane is an effective reducing agent for organic halides, selenides, xanthates, and isocyanides, as well as an effective hydrosilylating agent for dialkyl ketones and alkenes. The silane functions as a mediator in the formation of intermolecular carbon-carbon bonds via radicals and allows a variety of organic substrates to be used as alkyl radical percursors. Absolute rate constants for the reaction of (Me3Si)3Si radicals with a variety of organic compounds have been measured in solution by laser flash photolysis. At 294 K rate constants are > 5 x 10(7) M-1 s-1 for C = C double bonds that are activated by neighboring pi-electron systems or by electron-withdrawing groups. For other substrates, reactivities decreased in the order xanthate > selenide > isocyanide > nitro > sulfide.