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Citation: Pu Min, Liu Kun-Hui, Li Hui-Ying, Chen Biao-Hua. DFT Studies on Reaction Mechanism of the Double Bond Isomerization of Butene Catalyzed by 1-ethyl-3-methyl-lmidazolium of the Ionic Liquid[J]. Acta Physico-Chimica Sinica, ;2004, 20(08): 826-830. doi: 10.3866/PKU.WHXB20040809 shu

DFT Studies on Reaction Mechanism of the Double Bond Isomerization of Butene Catalyzed by 1-ethyl-3-methyl-lmidazolium of the Ionic Liquid

1.
Key Laboratory of Science and Technology of Controllable Chemical Reaction, Education Ministry, Beijing University of Chemical Technology, Beijing　100029

Received Date: 7 January 2004
Available Online: 15 August 2004

The geometries of reactant, product and transition state for the title reaction have been optimized using density functional theory (DFT) at the B3LYP/6-31G** and B3LYP/6-311＋＋G** levels. The equilibrium states and the transition state have been verified according to the number of imaginary frequency through vibrational analysis. The intrinsic reaction coordinates (IRC) have been traced, along which the changes of energies and geometric parameters have been analyzed. The computed results indicate that the present reaction is a one-step process, with the forward and reverse energy barriers being 192 and 208 kJ•mol－1 at the level of B3LYP/6-31G**, respectively, which means that the reaction might proceed at or above room temperature.
- 1-ethyl-3-methyl-imidazolium;Ionic liquid;Butene;Double bond isomerization;Transition state;Density functional theory
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