Citation:
Li Hui-Ying, Feng Wen-Lin, Ji Yong-Qiang, Xu Zhen-Feng, Lei Ming. The Reaction Path and Variational Rate Constant of the Hydrogen Abstraction Reaction CH2O+O[3P]→CHO+OH[J]. Acta Physico-Chimica Sinica,
;2002, 18(05): 446-450.
doi:
10.3866/PKU.WHXB20020513
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Using ab initio molecular orbital theory,the hydrogen abstraction reaction CH2O+O[3P]→CHO+OH has been studied.The geometries of the reactants,transition state and products have been optimized at the QCISD/6311G[d,p] level.The forward and reverse reaction potential barriers are 38.86 kJ•mol-1 and 67.23 kJ•mol-1 respectively at the QCISD(t,full)/6311G[d,p]//QCISD/6311G[d,p].By analyzing the changes of the generalized normalmode vibrational frequencies along the IRC,we found that the C-H bond breaking and the O-H bond forming took place as a concerted process.And there is a reactive vibrational normalmode which leads to the process of reaction from reactants to products.At the temperature range of 1 300~2 270 K,the forward and reverse reaction rate constants obtained by using the improved canonical variational transition state theory (ICVT),are consistent with the experimental values.
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