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• W2789948006 abstract "The rate constants for the reactions of OH radical with (E)- and (Z)-isomers of CF3CF═CHCl and CHF2CF═CHCl have been measured over the temperature range of 250–430 K. Kinetic measurements have been performed using flash and laser photolysis methods combined with laser-induced fluorescence. Arrhenius rate constants have been determined as k((E)-CF3CF═CHCl) = (1.09 ± 0.03) × 10–12 · exp[(50 ± 10)K/T], k((Z)-CF3CF═CHCl) = (8.02 ± 0.19) × 10–13 · exp[−(100 ± 10)K/T], k((E)–CHF2CF═CHCl) = (1.50 ± 0.03) × 10–12 · exp[(160 ± 10)K/T], and k((Z)–CHF2CF═CHCl) = (1.36 ± 0.03) × 10–12 · exp[(360 ± 10)K/T] cm3 molecule–1 s–1. Infrared absorption spectra have also been measured at room temperature. The atmospheric lifetimes of (E)-CF3CF═CHCl, (Z)-CF3CF═CHCl, (E)-CHF2CF═CHCl, and (Z)-CHF2CF═CHCl have been estimated as 8.9, 20, 4.6, and 2.6 days, respectively, and their global warming potentials and ozone depletion potentials were determined as 0.23, 0.88, 0.060, and 0.016 and 0.00010, 0.00023, 0.000057, and 0.000030, respectively. Additionally, the rate constants for OH radical addition and IR spectra of these compounds were determined computationally. Consistent with experiment, our calculations indicate that the reactivity toward OH radical addition is reduced as (Z)-CHF2CF═CHCl > (E)-CHF2CF═CHCl > (E)-CF3CF═CHCl > (Z)-CF3CF═CHCl, where the (E)/(Z) reactivity is reversed for CF3CF═CHCl and CHF2CF═CHCl. The calculations reproduced the observed temperature dependencies of the rate constants for the OH radical reactions, which is slightly positive for (Z)-CF3CF═CHCl but negative for the other compounds." @default.
• W2789948006 created "2018-03-29" @default.
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• W2789948006 date "2018-03-07" @default.
• W2789948006 modified "2023-10-14" @default.
• W2789948006 title "Rate Constants for the Reactions of OH Radical with the (<i>E</i>)/(<i>Z</i>) Isomers of CF₃CF═CHCl and CHF₂CF═CHCl" @default.
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• W2789948006 doi "https://doi.org/10.1021/acs.jpca.7b11923" @default.
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