Kinetics of the gas-phase reaction of CF2CF-CFCF2 with O3 and NO3 radicals

The kinetics of CF2CF-CFCF2 reaction with O3 (k1) and NO3 radicals (k2) were measured using a smog chamber/FTIR technique. The value of k1 was determined as (1.14 ± 0.94) × 10−16 exp [−(2800 ± 225)/T] in the range 225-308 K by means of an absolute rate method and k2 was determined to be (1.5 ± 0.2) × 10−15 cm3 molecule−1 s−1 at 298 K by a relative rate method. The tropospheric lifetime of CF2CF-CFCF2 was estimated at 6.3 and 0.8 years with respect to its reaction with O3 and NO3 radicals, respectively.