Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (04): 801-807.doi: 10.3866/PKU.WHXB20110409


Anionic Production Pathways Involved in the Reaction between OH- and CH2ClF

SONG Lei1, YU Feng2, WU Li-Xia1, ZHOU Xiao-Guo1, LIU Shi-Lin1   

  1. 1. Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China;
    2. Department of Mathematics and Physics, Xi′an Technological University, Xi′an 710032, P. R. China
  • Received:2010-11-24 Revised:2011-01-24 Published:2011-03-29
  • Contact: ZHOU Xiao-Guo
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20603033, 10979042) and National Key Basic Research Program of China (973) (2007CB815204).


The anionic production pathways involved in the reaction between hydroxide anion (OH-) and chlorofluoromethane (CH2ClF) were theoretically investigated. The optimized geometries of all the important species on the reaction potential energy surface were obtained at the B3LYP/6-31+G(d,p) and B3LYP/6-311++G(2d,p) levels. Consequently, harmonic vibrational frequencies and zero point energies (ZPEs) were calculated. Based on the relative energies of all the species that were calculated at the CCSD(T)/6-311+G(3df,3dp) level, the anionic production channels for the H+-abstraction and the bimolecular nucleophilic substitution (SN2) reaction processes are elaborated upon. According to the calculated barrier heights for the production pathways, the H+-abstraction channel is dominant, which agrees very well with previous experimental conclusions. In addition, non-typical anionic products are suggested to form during the SN2 reaction processes where the serious dynamic effect probably causes the SN2 reaction process to produce F-.

Key words: Hydroxide anion, Chlorofluoromethane, Reaction mechanism, Proton transfer, Nucleophilic substitution (SN2) reaction


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