Anna M. Smith, E. Rigler, E. Kwok
Apr 25, 1996
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0
Influential Citations
46
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Journal
Environmental Science & Technology
Abstract
6-Methyl-5-hepten-2-one is an atmospheric reaction product of the biogenic emission linalool, and trans-cinnamaldehyde is a model compound for dicarbonyls formed from the OH radical-initiated reaction of naphthalene. These carbonyl compounds react in the atmosphere, and photolysis and the gas-phase reactions of 6-methyl-5-hepten-2-one and trans-cinnamaldehyde with OH radicals, NO3 radicals, and O3 have been investigated at 296 ± 2 K and atmospheric pressure of air. Using relative rate methods, the respective rate constants obtained for the OH radical, NO3 radical, and O3 reactions were (in cm3 molecule-1 s-1 units) as follows: for 6-methyl-5-hepten-2-one: (1.57 ± 0.39) × 10-10, (7.5 ± 3.0) × 10-12, and (3.9 ± 1.5) × 10-16; for trans-cinnamaldehyde: (4.8 ± 1.4) × 10-11, (1.9 ± 0.7) × 10-14, and (2.2 ± 1.8) × 10-18. trans-Cinnamaldehyde was also observed to photolyze. Benzaldehyde was observed and quantified from the OH radical reaction with trans-cinnamaldehyde, with a yield of 0.90 ± 0.39. Acetone and ...