当前位置: X-MOL 学术Atmos. Environ. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Rate constants for reactions of OH radicals with (Z)-CF3CCl=CHCl, CHF2CF=CF2, (E)-CF3CH=CHF, (Z)-CF3CH=CHF, CH3CF=CH2, and CH2FCH=CH2
Atmospheric Environment ( IF 5 ) Pub Date : 2021-04-22 , DOI: 10.1016/j.atmosenv.2021.118428
Kazuaki Tokuhashi , Kenji Takizawa , Shigeo Kondo

The rate constants for the reaction of OH radicals with six halogenated propenes—(Z)-CF3CCl = CHCl (k1), CHF2CF=CF2 (k2), (E)-CF3CH=CHF (k3), (Z)-CF3CH=CHF (k4), CH3CF=CH2 (k5), and CH2FCH=CH2 (k6)—were measured over 250–430 K using the absolute rate method. The Arrhenius expressions for the rate constants were determined as k1 = (9.30 ± 0.54) × 10−13 exp [−(180 ± 20)/T], k2 = (1.43 ± 0.04) × 10−12 exp [(490 ± 10)/T], k3 = (4.86 ± 0.13) × 10−13 (T/298)0.727 exp [(110 ± 10)/T], k4 = (4.55 ± 0.12) × 10−13 (T/298)0.367 exp [(350 ± 10)/T], k5 = (3.22 ± 0.20) × 10−12 exp [(490 ± 20)/T], and k6 = (2.87 ± 0.19) × 10−12 exp [(440 ± 20)/T] cm3 molecule−1 s−1. Infrared absorption spectra of the halogenated propenes were measured at room temperature. The atmospheric lifetimes, global warming potentials of the halogenated propenes, and ozone depletion potential of (Z)-CF3CCl = CHCl were estimated. The correlation between the reactivity and structure of 44 halogenated alkenes, including the six halogenated propenes, was investigated.



中文翻译:

OH自由基与(Z)-CF 3 CCl = CHCl,CHF 2 CF = CF 2,(E)-CF 3 CH = CHF,(Z)-CF 3 CH = CHF,CH 3 CF = CH的反应速率常数2和CH 2 FCH = CH 2

OH自由基与六个卤化丙烯-(Z)-CF 3 CCl = CHCl(k 1),CHF 2 CF = CF 2k 2),(E)-CF 3 CH = CHF(k 3),(Z)-CF 3 CH = CHF(k 4),CH 3 CF = CH 2k 5)和CH 2 FCH = CH 2k 6)—使用绝对速率方法在250–430 K范围内进行了测量。速率常数的Arrhenius表达式确定为k 1 =(9.30±0.54)×10 -13 exp [-(180±20)/ T ],k 2 =(1.43±0.04)×10 -12 exp [(490 ±10)/ T ],k 3 =(4.86±0.13)×10 -13T / 298)0.727 exp [(110±10)/ T ],k 4 =(4.55±0.12)×10 -13T / 298)0.367 exp [(350±10)/ T ],k 5=(3.22±0.20)×10 -12 exp [(490±20)/ T ],k 6 =(2.87±0.19)×10 -12 exp [(440±20)/ T ] cm 3分子-1  s -1。在室温下测量卤代丙烯的红外吸收光谱。估算了大气寿命,卤化丙烯的全球变暖潜势以及(Z)-CF 3 CCl = CHCl的臭氧耗竭势。研究了包括六个卤代丙烯在内的44种卤代烯烃的反应性与结构之间的相关性。

更新日期:2021-05-02
down
wechat
bug