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• W2023297715 abstract "A kinetic and product study of the atmospheric chemistry of toluene-1,2-oxide/2-methyloxepin, a possible intermediate in the OH-initiated oxidation of toluene, was conducted in a 1080 l quartz glass reaction chamber. The compound was found to be unstable, with a thermal decomposition lifetime of (333±83) min. Photolysis with superactinic lamps (320 nm<λ<460 nm, λmax=360 nm) was found to be slow, while that with low-pressure Hg lamps (λmax=254 nm) proceeded rapidly. For clear sky conditions at noon on July 1 at a latitude of 40°N, an atmospheric photolytic lifetime of (26±4) min can be extrapolated from the experimental data using the superactinic lamps. For the reaction with OH radicals, a reaction rate constant of (2.1±0.1)×10−10 cm3 molecule−1 s−1 was determined; the main products were E/Z-isomers of 6-oxohepta-2,4-dienal. Reaction with NO3 radicals was observed to proceed with a rate constant of (1.27±0.10)×10−11 cm3 molecule−1 s−1; the main products were unidentified nitrogen-containing compounds. In addition, 2E,4Z-6-oxohexa-2,4-dienal was identified; other isomers are probably formed as well. The results suggest that under atmospheric conditions both photolysis and reaction with OH radicals will be important sinks for toluene-1,2-oxide/2-methyloxepin, while reaction with NO3 radicals will become important under laboratory conditions at high concentrations of NOx, possibly also in heavily polluted tropospheric air masses." @default.
• W2023297715 created "2016-06-24" @default.
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• W2023297715 date "2000-01-01" @default.
• W2023297715 modified "2023-10-01" @default.
• W2023297715 title "Atmospheric chemistry of toluene-1,2-oxide/2-methyloxepin" @default.
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• W2023297715 doi "https://doi.org/10.1039/a908365k" @default.
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