On the temperature dependence of the rate in barrierless reactions in solution

Bagchi, Biman (1987) On the temperature dependence of the rate in barrierless reactions in solution Chemical Physics Letters, 139 (1). pp. 119-123. ISSN 0009-2614

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/000926...

Related URL: http://dx.doi.org/10.1016/0009-2614(87)80162-8

Abstract

We present a theoretical study of the temperature dependence of the relaxation rate in barrierless reactions. It is shown that a small change in the relative positions of the ground and excited potential surfaces can lead to a significant change in the relaxation rate. We suggest that a small shift of the potential surfaces, during the isoviscous temperature variation, may be responsible for the solvent-induced crossover from an apparent negative activation energy to a large positive activation energy observed in recent experiments.

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