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Kinetics of the reactions of OH radicals with n ‐alkanes at 299 ± 2 K
Author(s) -
Atkinson R.,
Aschmann S. M.,
Carter W. P. L.,
Winer A. M.,
Pitts J. N.
Publication year - 1982
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.550140706
Subject(s) - chemistry , radical , nonane , decane , reaction rate constant , propane , pentane , octane , heptane , butane , medicinal chemistry , alkane , photochemistry , kinetics , hydrocarbon , organic chemistry , physics , quantum mechanics , catalysis
Relative rate constants for the reaction of OH radicals with a series of n ‐alkanes have been determined at 299 ± 2 K, using methyl nitrite photolysis in air as a source of OH radicals. Using a rate constant for the reaction of OH radicals with n ‐butane of 2.58 × 10 −12 cm 3 molecule −1 s −1 , the rate constants obtained are (X10 12 cm 3 molecule −1 s −1 ): propane 1.22 ± 0.05, n ‐pentane 4.13 ± 0.08, n ‐heptane 7.30 ± 0.17, n ‐octane 9.01 ± 0.19, n ‐nonane 10.7 ± 0.4, and n ‐decane 11.4 ± 0.6. The data for propane, n ‐pentane, and n ‐octane are in good agreement with literature values, while those for n ‐heptane, n ‐nonane, and n ‐decane are reported for the first time. These data show that the rate constant per secondary C—H bond is ∽40% higher for —CH 2 — groups bonded to two other —CH 2 — groups than for those bonded to a —CH 2 — group and a —CH 3 group.