-4 Hammett study of the addition of the trichloromethyl radical to 3-phenyl-1-propenes and 4- phenyl-lbutenes has led to p-values of-0.29 and-0 20, respectively These unexpectedly high values for reactions which produce alkyl radicals insulated from the substituted phenyl group by one and two methylene groups are explained as being the result of the formation of, and intramolecular addition within, a r-complex of the trichloromethyl radical with the phenyl ...