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Absolute rate constants for hydrogen abstraction from hydrocarbons by the trichloromethylperoxyl radical
Author(s) -
Mosseri S.,
Alfassi Z. B.,
Neta P.
Publication year - 1987
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.550190405
Subject(s) - hexamethylbenzene , chemistry , radiolysis , cyclohexane , radical , reaction rate constant , cyclohexene , photochemistry , hydrogen atom abstraction , cycloalkene , hydrogen , kinetics , hydrocarbon , organic chemistry , catalysis , benzene , physics , quantum mechanics
Absolute rate constants have been measured for the reactions of trichloromethylperoxyl radicals with cyclohexane, cyclohexene, and hexamethylbenzene. The CCl 3 O 2 radicals were produced by pulse radiolysis of air‐saturated CCl 4 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 metalloporphyrin 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 × 10 3 , 1.0 × 10 5 , and 7.5 × 10 4 M −1 s −1 , respectively.