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1 Polish Journal of Chemistry

1 2002

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Dynamics of Molecular Hydrogen Exchange in Hydrogen-Bonded Systems

Bureiko S., Denisov G. S.

Polish Journal of Chemistry

2002

Vol. 76 / nr 9

1177-1190

The kinetics of hydrogen exchange in molecular systems with H-bonds studied by kinetic IR spectroscopy and low-temperatureNMRspectroscopy methods is critically reviewed. The experimental rate constants and activation energies obtained so far for molecules capable of forming H-bonds as both proton donors and proton acceptors are collected and analyzed from the point of view of the influence of H-bond formation ability of the molecules- partners. The evidence available testifies to a molecular mechanism of the H-exchange reactions in inert solvents and in the gas phase via the formation of cyclic, mostly bimolecular, intermediates. The different mechanisms of the molecular H-exchange process in inert media are discussed and the possible paths of experimental elucidation of reaction mechanism are offered.