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Rate constants for the gas-phase reactions of cis-3-Hexen-1-ol, cis-3-Hexenylacetate, trans-2-Hexenal, and Linalool with OH and NO3 radicals and O3 at 296 ± 2 K, and OH radical formation yields from the O3 reactions

✍ Scribed by Roger Atkinson; Janet Arey; Sara M. Aschmann; Stephanie B. Corchnoy; Yonghui Shu

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
867 KB
Volume
27
Category
Article
ISSN
0538-8066

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✦ Synopsis

Rate constants for the gas-phase reactions of the four oxygenated biogenic organic compounds cis-3hexen-1-01, cis-3-hexenylacetate, trans-2-hexenal, and linalool with OH radicals, NO3 radicals, and O3 have been determined at 296 2 2 K and atmospheric pressure of air using relative rate methods. The rate constants obtained were (in cm3 molecule-' s-' units): cis-3-hexen-1-01: (1.08 ? 0.22) X for reaction with the OH radical; (2.72 ? 0.83) X for reaction with the NO3 radical; and (6.4 ? 1.7) x for reaction with 03; cis-3-hexenylacetate: (7.84 2 1.64) X lo-'' for reaction with the OH radical;

(2.46 ? 0.75) X for reaction with 0 3 ; trans-2-hexenal: (4.41 f 0.94) x lo-'' for reaction with the OH radical; (1.21 2 0.44) X

for reaction with the NO3 radical; and (2.0 2 1.0) X for reaction with the OH radical; (1.12 If-0.40) X for reaction with the NO3 radical; and (4.3 2 1.6) X 10-l6 for reaction with 0 3 . Combining these rate constants with estimated ambient tropospheric concentrations of OH radicals, NO3 radicals, and 0 3 results in calculated tropospheric lifetimes of these oxygenated organic compounds of a few hours.

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