KINETIC-STUDY OF OH REACTIONS WITH PERFLUOROPROPENE AND PERFLUOROBENZENE

We report the results of kinetic studies of the reactions OH + perfluoropropene (293-831 K) and OH + perfluorobenzene (244-830 K) performed by using the laser photolysis/cw, laser-induced fluorescence technique. The primary reactive step involves OH addition to a multiple bond. A reaction model based on the accepted mechanism for OH + hydrogenated unsaturate reactions is applied to the subject reactions with only partial success. We compare adduct bond dissociation energies determined from the reaction model with those computed in electronic-structure calculations. Discrepancies in these and other model-determined parameters suggest that fluorination of the unsaturated reactants significantly complicates the reaction mechanism.