Reaction rate constants with OH radicals at 253–328 K and atmospheric implications for (CF3)2CHOCxH(2x + 1) (x = 1, 2, 3)

Abstract

Rate constants at 253–328 K for reactions of OH radicals with (CF3)2CHOCH3 (k6), (CF3)2CHOCH2CH3 (k7), and (CF3)2CHOCH2CH2CH3 (k8) were studied using a relative rate method. Data on k6, k7, and k8 (2.13 × 10−13, 1.07 × 10−12, and 1.92 × 10−12 cm3 molecule−1 s−1, respectively) were obtained at 298 K. The corresponding radiative efficiencies (0.103, 0.034, and 0.021 W m−2 ppb−1) were calculated from infrared absorption spectra measured at room temperature. Global warming potential (GWP100) was estimated to be 5, <1, and <1, respectively, and the photochemical ozone creation potential in all cases was <10.