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

✍ Scribed by M. Goto; M. Kawasaki; T. J. Wallington; M. D. Hurley; A. P. Sharratt

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
185 KB
Volume
34
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

Smog chamber/FTIR techniques were used to study the Cl atom initiated oxidation of CH~2~FOCH~2~F in 700 Torr of N~2~/O~2~ at 296 K. Relative rate techniques were used to measure k(Cl + CH~2~FOCH~2~F) = (4.6 ± 0.7) × 10^−13^ and k(Cl + CH~2~FOC(O)F) = (2.9 ± 0.8) × 10^−15^ (in units of cm^3^ molecule^−1^ s^−1^). Three competing fates for alkoxy radical CH~2~FOCHFO· formed in the self‐reaction of the corresponding peroxy radicals were identified. In 1 atm of air at 296 K, 48 ± 3% of CH~2~FOCHFO· 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 CH~2~FOCHFO· radicals formed in the CH~2~FOCHFOO· + NO reaction. Infrared spectra of CH~2~FOC(O)F and FC(O)OC(O)F, which are produced during the Cl atom initiated oxidation of CH~2~FOCH~2~F, are presented. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 34: 139–147, 2002; DOI 10.1002/kin.10038

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