The mechanism of exchange of intramolecularly hydrogen-bonded protons in a diamide

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Abstract

Two alternative mechanisms for the exchange of intramolecularly hydrogen-bonded protons in a diamide have been theoretically studied by means of the AM1 method. Direct abstraction, and rotation about the C-N bond followed by abstraction, have been considered for both the base-catalysed and the acid-catalysed exchange. From the results obtained in this paper it can be concluded that the base-catalysed exchange takes place by direct abstraction, the internal hydrogen bond clearly retarding the proton exchange. Conversely, the internal hydrogen bond does not appreciably retard acid-catalysed proton exchange.
Original languageEnglish
Pages (from-to)1621-1624
JournalJournal of the Chemical Society, Perkin Transactions 2
Issue number9
Publication statusPublished - 1 Dec 1992

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