The reactivities of perfluoroisopropyl and tert-butyl radicals towards hydrogen atom abstraction from triethylsilane
Abstract
The rates of hydrogen abstraction from triethylsilane by the highly electrophilic perfluoroisopropyl and perfluoro-tert-butyl radicals have been obtained through competition experiments. These rates, 3.6 × 106 and 2.4 × 108M–1 s–1, respectively, are indicative of substantial reactivity enhancements, relative to perfluoro-n-alkyl radicals, derived from their enhanced electrophilicity and, in the latter case, from a much stronger forming C–H bond.