Abstract
The photodissociation of hexafluoropropene at 193 nm was studied using photofragment translational spectroscopy. One primary channel results in loss of a fluorine atom; from the maximum translational energy release, a value of 121 kcal/mol was determined to be the upper limit for the CF bond dissociation energy. In addition, elimination of CF 2 and CF 3 compeetes with C-F bond cleavage. A branching fraction, CF 2:F:CF 3, of 0.42:0.41:0.17 was found among these three primary channels. A comparison of UV photolysis and infrared multiphoton dissociation experiments suggests that excitation and dissociation on an excited state surface competes with internal conversion and dissociation from the ground state.
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