A theoretical insight into the catalytic action in Friedel-Crafts reaction

V. Branchadell, A. Oliva, J. Bertrán

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4 Citations (Scopus)

Abstract

The catalytic action of H+ and BF3 in the reaction between CH4 and HF, taken as a model of a Friedel-Crafts reaction, has been theoretically studied by means of ab initio methods using the split-valence 3-21G basis set. It has been shown that the formation of a complex with the catalyst increases the electrophilic character of hydrogen fluoride. As a direct consequence the potential energy barrier of the electrophilic attack step is drastically diminished, especially in the case of catalysis by H+. When the reaction is catalyzed by BF3, two different mechanisms have been investigated. While one of them corresponds to a traditional acid catalysis, in the other one BF3 acts as a bifunctional catalyst, this latter being clearly more efficient. The reasons which permit us to understand these different kinds of catalytic action have been carefully analyzed. © 1988.
Original languageEnglish
Pages (from-to)285-294
JournalJournal of Molecular Catalysis
Volume44
Issue number2
DOIs
Publication statusPublished - 29 Feb 1988

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