These results are The 3-phenylpropyl-l-Cl4 radical similarly generated does not or by the" Kharasch reaction" of l, l-dibenzyl-2-chloroethane, does not rearrange via a 1, 2-benzyl shift. dence suggests that for free radicals the migratory aptitude is in the order phenyl> benzyl. compared with those reported for carbanions. rearrange to the 1-phenylpropyl-l-C14 radical via a 1, 3-phenyl shift.