Atmospheric chemistry of trans-CF₃CH=CHF: products and mechanisms of hydroxyl radical and chlorine atom initiated oxidation

M. S. Javadi (1) , R. Søndergaard (1) , O. J. Nielsen (1) , M. D. Hurley (2) , T. J. Wallington (2)

1 Department of Chemistry [Copenhagen]
2 System Analytics and Environmental Sciences Department

Smog chamber/FTIR techniques were used to study the products and mechanisms of OH radical and Cl atom initiated oxidation of trans-CF₃CH=CHF in 700 Torr of N₂/O₂ diluent at 295±1 K. Hydroxyl radical initiated oxidation leads to the formation of CF₃CHO and HC(O)F in yields which were indistinguishable from 100% and were not dependent on the O₂ partial pressure. Chlorine atom initiated oxidation gives HC(O)F, CF₃CHO, CF₃C(O)Cl, and CF₃C(O)CHFCl. The yields of CF₃C(O)Cl and CF₃C(O)CHFCl increased at the expense of HC(O)F and CF₃CHO as the O₂ partial pressure was increased over the range 5?700 Torr. The results are discussed with respect to the atmospheric chemistry and environmental impact of trans-CF₃CH=CHF.

Domaines: Océan, Atmosphère

M. S. Javadi, R. Søndergaard, O. J. Nielsen, M. D. Hurley, T. J. Wallington. Atmospheric chemistry of trans-CF₃CH=CHF: products and mechanisms of hydroxyl radical and chlorine atom initiated oxidation. Atmospheric Chemistry and Physics Discussions, 2008, 8 (1), pp.1069-1088. ⟨hal-00303260⟩