Kinetic Studies for the Reaction of -CHCHOO with CFCH═CH.

Hydrofluoroolefins (HFOs, CFCH═CH) have great potential to replace hydrofluorocarbons (HFCs) as refrigerants. Here the kinetics for the reaction of -CHCHOO with CFCH═CH (HFO-1243zf), the simplest of HFOs, have been studied in a flash photolysis flow reactor at a total pressure of 50 Torr, by using the OH laser-induced fluorescence (LIF) method. The bimolecular reaction rate coefficients were measured at temperatures ranging from 283 to 318 K. A weak positive temperature dependence was observed, with an activation energy of 1.41 ± 0.12 kcal mol. At 298 K, the measured rate coefficient was (2.42 ± 0.51) × 10 cm s, in the vicinity of the previously reported upper limit value for the reaction of CHOO with CFCH═CH.