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Absolute rate constants for hydrogen abstraction from hydrocarbons by the trichloromethylperoxyl radical

✍ Scribed by S. Mosseri; Z. B. Alfassi; P. Neta

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 357 KB
Volume: 19
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550190405

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✦ Synopsis

Absolute rate constants have been measured for the reactions of trichloromethylperoxyl radicals with cyclohexane, cyclohexene, and hexamethylbenzene. The CClsO, radicals were produced by pulse radiolysis of air-saturated CCl, solutions containing various amounts of the hydrocarbons. The rate constants were determined by competition with the one-electron oxidation of metalloporphyrins, using the rate of formation of the rnetalloporphyrin radical cation absorption to monitor the reaction by kinetic spectrophotometry. The rate constants for hydrogen abstraction from cyclohexane, cyclohexene, and hexamethylbenzene were found to be 1 x lo3, 1.0 x lo5, and 7.5 x lo4 M-' s-', respectively.

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