Persistent Phosphinyl Radicals Featuring a Bulky Amino Substituent and the 2,6-Bis(trifluoromethyl)phenyl Group

Abstract

Persistent phosphinyl radicals featuring the 2,6-bis(trifluoromethyl)phenyl group were prepared and characterized. Their electronic structure was theoretically investigated, and their low-temperature dimerization into the corresponding diphosphines was found to be strongly inhibited when the sterically very demanding (tert-butyl)(trimethylsilyl)amino substituent was used.