Kinetic studies of the reactions of azide ion in 70% acetone-30~~, water and iodide ion in anhydrous acetone with cy-and 7-trifluoromethylallyl p-bromobenzenesulfonates and r- trifluorometh~ lall?-l chloride indicate that a 7-trifluoromethyl group enhances the rate of nucleophilic displacement upon allylic compounds. An Sx2'niechanism for nucleophilic attack upon cy-trifluoromethylallyl p-bro~ nobenzenesul€ onate is discussed
