Chem. J. Chinese Universities

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Theoretical Studies on Hydrogen overfall Mechanism for Catalyzed Hydroisomerization of n-Hexane

AI Chun-Zhi1,2, SUN Ren-An1*, WANG Chang-Sheng1, MA Lin1, YANG Ling2   

    1. College of Chemistry and Chemical Engineering , Liaoning Normal University, Dalian 116029, China;
    2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116021, China
  • Received:2006-10-23 Revised:1900-01-01 Online:2008-01-10 Published:2008-01-10
  • Contact: SUN Ren-An

Abstract: The mechanism and the related reaction paths in the hydroisomerization of n-hexane were studied with DFT calculations at the B3LYP/6-311++G** level. Five possible transition states were theoretically predicted and verified by the vibration frequency analysis as well as the calculations of intrinsic reaction coordinates(IRC). Further more, the related reaction barriers were evaluated on the basis of single point energy with zero point vibration correction, and the distribution of natural charge was analyzed at MP2/6-311++G** level. Consequently, six pathways were found and the barrier energy of the main isomerization pathway is 42.52 kJ/mol.

Key words: n-Hexane, Density Functional Theory, Reaction mechanism, Hydrogen overfall, Catalyzed hydroisomerization

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