Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (8): 1406.doi: 10.7503/cjcu20170039

• Physical Chemistry • Previous Articles     Next Articles

Mechanism Research of Reactions of Metal Carbides and Carbenes Cation[M-X] +(M=Au, Ag, Cu; X=C, CH2) with Methane

SUN Xiaoli1, MENG Lingmin2, JIN Mingxing3, LI Jilai1   

  1. 1. Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China;
    2. Dirui Industrial Co., Ltd, Changchun 130103, China;
    3. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • Received:2017-01-17 Revised:2017-07-10 Online:2017-08-10 Published:2017-07-10
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21473070) and the Project of China Postdoctoral Science Foundation(No.2016M591476).

Abstract:

In this article, the reaction mechanism of the cation[Au(CH2)] + and methane was investigated at the CCSD(T)-REL//B2GP-PLYP level of theory initially. A detailed analysis of geometric structure changes during the C-H bond activation was given. As a major result, based on natural bond orbital(NBO) charge and molecular orbital analysis, a hydride transfer mechanistic scenario from methane to[Au(CH2)] + was identified unambiguously. Methane activation has been identified among its reaction with[M-X] +(M=Au, Ag, Cu; X=C, CH2). Analysis for the inherent factors during the reaction of methane as a hydrogen donor is given. The M-X bond energy and the low-lying vacant orbital directly involved in the reaction of the active center C play an important role on the reaction activity, and both mediated microscopic mechanism. This study may provide important guidance for the rational design of catalysts.

Key words: C-H Bond activation, Carbene cation, Proton transfer, Hydrogen atom transfer, Hydride transfer

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