Atmospheric chemistry of CF3O radicals: reaction with O3

A relative rate technique has been used to study the title reaction over the pressure range 100–700 Torr of air at 296 ± 2 K. Four different reference compounds (13CO, CH4, CH2FCl, and CD4) were used. Using k(CF3O + CH4) = (2.2 ± 0.2) × 10−14 cm3 molecule−1 s−1 a rate constant of k(CF3O + O3) = (1.5 ± 0.5) × 10−14 cm3 molecule−1 s−1 was derived, quoted errors reflect statistical and potential systematic errors. There was no observable effect of diluent pressure over the range 100–700 Torr. As part of the present work the rate constant for reaction of CF3O radicals with CH2FCl was determined to be (1.2 ± 0.2) × 10−14 cm3 molecule−1 s−1. Implications for the atmospheric chemistry of CF3O radicals are discussed.