Atmospheric chemistry of CH2FOCH2F:: Reaction with Cl atoms and atmospheric fate of CH2FOCHFO• radicals

Smog chamber/FTIR techniques were used to study the Cl atom initiated oxidation of CH2FOCH2F in 700 Torr of N-2/O-2 at 296 K Relative rate techniques were used to measure k(Cl + CH2FOCH2F) = (4.6 +/- 0.7) x 10(-13) and k(Cl + CH2FOC(O)F) = (2.9 +/- 0.8) x 10(-15) (in units of cm(3) molecule(-1) s(-1)). Three competing fates for alkoxy radical CH2FOCHFO. formed in the self-reaction of the corresponding peroxy radicals were identified. In 1 atm of air at 296 K, 48 +/- 3% of CH2FOCHFO. radicals decompose via C-O bond scission, 21 +/- 4% react with O-2, and 31 +/- 4% undergo hydrogen atom elimination. Chemical activation effects were observed for CH2FOCHFO. radicals formed in the CH2FOCHFOO. + NO reaction Infrared spectra of CH2FOC(O)F and FC(O)OC(O)F, which are produced during the Cl atom initiated oxidation of CH2FOCH2F, are presented. (C) 2002 Wiley Periodicals, Inc.