Rate constants calculation of hydrogen abstraction reactions CH3CHBr+HBr and CH3CBr2+HBr
Rate constants calculation of hydrogen abstraction reactions CH3CHBr+HBr and CH3CBr2+HBr
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夺氢反应 CH3CHBr HBr 和 CH3CBr2 HBr 的速率常数计算
DOI:
10.1002/qua.24076
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发表时间:
2013-04
影响因子:
2.2
通讯作者:
Zhang, Jinglai
中科院分区:
文献类型:
--
作者:
Wang, Li;Zhao, Jianxiang;He, Hongqing;Zhang, Jinglai
Dual-level direct dynamics method is used to study the kinetic properties of the hydrogen abstraction reactions of CH3CHBr + HBr CH3CH2Br + Br (R1) and CH3CBr2 + HBr CH3CHBr2 + Br (R2). Optimized geometries and frequencies of all the stationary points and extra points along the minimum-energy path are obtained at the MPW1K/6-311+G(d,p), MPW1K/ma-TZVP, and BMK/6-311+G(d,p) levels. Two complexes with energies less than that of the reactants are located in the entrance of each reaction at the MPW1K/6-311+G(d,p) and MPW1K/ma-TZVP levels, respectively. The energy profiles are further refined with the interpolated single-point energies method at the G2M(RCC5)//MPW1K/6-311+G(d,p) level of theory. By the improved canonical variational transition-state theory with the small-curvature tunneling correction (SCT), the rate constants are evaluated over a wide temperature range of 2002000 K. Our calculations have shown that the radical reactivity decreases from CH3CHBr to CH3CBr2. Finally, the total rate constants are fitted by two modified Arrhenius expression. (c) 2012 Wiley Periodicals, Inc.
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DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
通讯作者:
--
影响因子:
2.9
作者:
Chuang, YY;Corchado, JC;Truhlar, DG
通讯作者:
Truhlar, DG
影响因子:
1.7
作者:
Jingjing Zheng;Xuefei Xu;D. Truhlar
通讯作者:
Jingjing Zheng;Xuefei Xu;D. Truhlar
影响因子:
4.4
作者:
C. Flanagan;L. Pierce
通讯作者:
C. Flanagan;L. Pierce
影响因子:
15
作者:
LIU, YP;LYNCH, GC;GARRETT, BC
通讯作者:
GARRETT, BC