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Temperature dependence of the self‐decay rate constants of some phenoxyl radicals in aqueous solution
Author(s) -
Alfassi Z. B.,
Shoute L. C. T.
Publication year - 1993
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550250203
Subject(s) - chemistry , radical , arrhenius equation , aqueous solution , reaction rate constant , diffusion , activation energy , photochemistry , arrhenius plot , kinetics , thermodynamics , organic chemistry , physics , quantum mechanics
The Arrhenius parameters of the bimolecular rate constants for the decay of several phenoxyl radicals in aqueous solution were measured. The p ‐halophenoxyl radicals (F, Cl, and Br) decay in a diffusion controlled reaction as the activation energies are the same as that of diffusion of water (16 ± 1.5 kJ · mol −1 ). The A factors are 10 12.2 ± 0.2 . For alkyl and alkoxy substituted phenoxyl, slightly higher activation energies were found (19.5 − 21.9 kJ · mol −1 ). © 1993 John Wiley & Sons, Inc.