Premium
The fate of the hydroxyalkoxy radical in the OH‐initiated oxidation of isoprene
Author(s) -
Reitz June E.,
McGivern W. Sean,
Church M. Clark,
Wilson Marc D.,
North Simon W.
Publication year - 2002
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.10050
Subject(s) - chemistry , isoprene , radical , reaction rate constant , decomposition , photodissociation , photochemistry , torr , total pressure , kinetics , organic chemistry , physics , quantum mechanics , copolymer , thermodynamics , polymer
Rate constants for several intermediate steps in the OH‐initiated oxidation of isoprene were determined using laser‐photolysis/laser‐induced fluorescence of OH radicals at total pressures between 3 and 4 Torr at 295 K. The rate constant for decomposition of the hydroxyalkoxy radical was determined to be (3.0 ± 0.5) × 10 4 s −1 in this pressure range, which is in fair agreement with previous work. The presence of a prompt alkoxy decomposition pathway was also investigated and found to contribute less than 10% to the total hydroxyalkoxy radical decomposition. The rate constant for the reaction of the hydroxyperoxy radical with NO was determined to be (2.5 ± 0.5) × 10 −11 cm 3 molecule −1 s −1 , which is moderately higher than previously reported. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 34: 255–261, 2002