Kinetics of atomic chlorine (2PJ) reactions with the chloroethanes EtCl, MeCHCl2, ClCH2CH2Cl and ClCH2CHCl2
作者:P. H. Wine、D. H. Semmes
DOI:10.1021/j100241a040
日期:1983.9
Rate constants for the reactions of hydroxyl with five halogen-substituted ethanes from 292 to 366 K
作者:L. X. Qiu、S. H. Shi、S. B. Xing、X. G. Chen
DOI:10.1021/j100181a032
日期:1992.1
The discharge flow and resonance fluorescence (DF-RF) method was used to measure the rate constants of OH reactions with four halogenated ethans from 292 to 366 K. The results are as follows (cm3 molecule-1 s-1); ClCH2CH2Cl: k1 = (10.5 +/- 1.6) x 10(-12) exp(-(1141 +/- 107)/T) BrCH2CH2Br: k2 = (14.6 +/- 2.6) x 10(-12) exp(-(1281 +/- 136)/T) Cl2CHCHCl2: k3 = (3.70 +/- 0.46) x 10(-12) exp(-(816 +/- 90)/T) CH3CH2Br: k4 = (27.7 +/- 3.4) x 10(-12) exp(-(1344 +/- 87)/T) Errors in these Arrhenius parameters are standard deviation 1-sigma. The rate constants at 296 K are 2.22 +/- 0.44, 1.93 +/- 0.39, 2.35 +/- 0.47, and 2.96 +/- 0.60 (10(-13) cm3 molecule-1 s-1), respectively. The rate constant of the OH + Cl3CCHCl2 reaction was measured at 292 K. It is 2.33 +/- 0.46 (10(-13) cm3 molecule-1 s-1). Earlier work done at 296 K for CH2ClCH2Cl and CH2BrCH2Br gave 2.20 +/- 0.50 and 2.50 +/- 0.55 (10(-13) cm3 molecule-1 s-1), which is in good agreement with that of 1,2-dichloroethane but in poor agreement for that of 1,2-dibromoethane. It is shown that the results obtained from Arrhenius equation of these reactions, except that for CH3CH2Br, could be found in good agreement with those of experiment by using the bond energy bond order-activated complex theory (BEBO-ACT) method and assuming free internal rotation in the activated complex molecules.
Atmospheric Chemistry of 1,2-Dichloroethane: UV Spectra of CH<sub>2</sub>ClCHCl and CH<sub>2</sub>ClCHClO<sub>2</sub> Radicals, Kinetics of the Reactions of CH<sub>2</sub>ClCHCl Radicals with O<sub>2</sub> and CH<sub>2</sub>ClCHClO<sub>2</sub> Radicals with NO and NO<sub>2</sub>, and Fate of the Alkoxy Radical CH<sub>2</sub>ClCHClO
作者:Timothy J. Wallington、Merete Bilde、Trine E. Møgelberg、Jens Sehested、Ole J. Nielsen
DOI:10.1021/jp952149g
日期:1996.1.1
O2 in one bar of SF6 diluent was (2.4 ± 0.3) × 10-12 cm3 molecule-1 s-1. The rate constants for the reactions of CH2ClCHClO2 radicals with NO and NO2 were k5 ≥ 9 × 10-12 and k6 = (9.8 ± 0.6) × 10-12 cm3 molecule-1 s-1, respectively. The rate constant for the reaction of F atoms with CH2ClCH2Cl was k3 = (2.6 ± 0.2) × 10-11 cm3 molecule-1 s-1. The reaction of CH2ClCHClO2 radicals with NO produced NO2
使用脉冲辐射分解技术测量CH 2 ClCHCl和CH 2 ClCHClO 2自由基在230-300 nm范围内的紫外吸收光谱。在250 nm处,σ(CH 2 ClCHClO)=(1.7±0.2)×10 -18和σ(CH 2 ClCHClO 2)=(3.5±0.5)×10 -18 cm 2分子-1。观察到的CH 2 ClCHCl自由基的自反应速率常数为-d [CH 2 ClCHCl] / d t = 2 k 4 [CH 2 ClCHCl] 2为k 4 =(2.0±0.3)×10-11 cm 3分子-1 s -1。一巴SF 6稀释剂中CH 2 ClCHCl自由基与O 2反应的速率常数为(2.4±0.3)×10 -12 cm 3分子-1 s -1。速率常数为CH的反应2 ClCHClO 2个自由基与NO和NO 2都ķ 5 ≥9×10 -12和ķ 6 =(9.8±0.6)×10 -12厘米3分子-1小号-1,
Ma, Peihua; Liu, Julin; Chen, Guancheng, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1990, vol. 46, # 4, p. 577 - 580