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Title: Theoretical mechanistic study of the ethylene oxidation over permanganate: effect of BF<inf>3</inf>Lewis acid
Authors: Thana Maihom
Saowapak Choomwattana
Bundet Boekfa
Piti Treesukol
Kasetsart University
Mahidol University
Keywords: Chemistry
Issue Date: 1-Jul-2017
Citation: Monatshefte fur Chemie. Vol.148, No.7 (2017), 1277-1284
Abstract: © 2017, Springer-Verlag Wien. Abstract: The mechanism of ethylene oxidation to ethylene glycol on the permanganate material has been investigated by density functional theory with the M06-L functionals. Effect of the BF3coordination to the MnO4−on the mechanism has been examined in details. The initial step is the activation of ethylene C=C bond via the [3+2] electrocyclic addition. The calculated reaction barrier of this step on MnO4−material (53.67 kJ mol−1) is decreased significantly with the presence of BF3(32.37 kJ mol−1). In the next step of cyclic intermediate hydration to ethylene glycol, the activation energies for the first and second hydrations are 136.14 and 93.03 kJ mol−1on BF3–MnO4−, and 147.08 and 134.87 kJ mol−1on MnO4−. These results demonstrate that the BF3coordinated to the MnO4−material can enhance the overall conversion of ethylene to ethylene glycol. Molecular orbital analysis provides more understanding regarding the role of BF3in this reaction.
ISSN: 00269247
Appears in Collections:Scopus 2016-2017

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