FTIR smog chamber experiments were performed to investigate the atmospheric fate of E- and Z-CFCH = CHCF (1,1,1,4,4,4-hexafluoro-2-butene). The experiments were performed to study reactions of E-CFCH = CHCF or Z-CFCH = CHCF with Cl atoms, OH radicals, and O in 700 Torr of N/O diluents at 296 ± 2 K. The study determined the Cl atom, OH radical, and O kinetics and the mechanism of the atmospheric oxidation of E- and Z-CFCH = CHCF. The main atmospheric fate for both compounds is reaction with OH radicals. Atmospheric chemistry of the reaction of Z-CFCH = CHCF with OH and OD radicals were investigated by Baasandorj et al. in 2011, no other previous studies are available. The results of the present study are compared to the findings of Baasandorj et al. assessing the atmospheric impact of E- and Z-CFCH = CHCF. Infrared spectra were recorded, and the atmospheric lifetimes, the radiative forcings and global warming potentials (GWP) of the two butenes were calculated. This study provides a comprehensive description of the atmospheric fate of E- and Z-CFCH = CHCF. We present here the first results on the atmospheric chemistry of E-CFCH = CHCF and of the Cl- and O-initiated chemistry of Z-CFCH = CHCF.


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