Environmental science and technology p. 1674 - 1680 (1995)
Update date:2022-08-17
Topics:
Atkinson, Roger
Tuazon, Ernesto C.
Aschmann, Sara M.
The products of the gas-phase reactions of the OH radical with 1-pentene, 1-hexene, 1-heptene, 1-octene, 2,3-dimethyl-1-butene, and 1-methylcyclohexene have been investigated in the presence of NO at room temperature and 740 Torr total pressure of air. Products were identified and quantified by gas chromatography and in situ Fourier transform infrared absorption spectroscopy. The carbonyl products identified and their yields were as follows: from 1-pentene, butanal (0.73 +/- 0.09) and HCHO (0.88 +/- 0.11); from 1-hexene, pentanal (0.46 +/- 0.07) and HCHO (0.57 +/- 0.08); from 1-heptene, hexanal (0.30 +/- 0.04) and HCHO (0.49 +/- 0.06); from 1-octene, heptanal (0.21 +/- 0.03) and HCHO (0.39 +/- 0.06); from 2,3-dimethyl-1-butene, acetone (0.27 +/- 0.04), 3-methyl-2-butanone, (0.45 +/- 0.06), and HCHO (0.50 +/- 0.04); and from 1-methylcyclohexene, 5-acetylpentanal (0.31 +/- 0.08). These product yield data suggest that the intermediate β-hydroxyalkoxy radicals undergo isomerization and/or reaction with O2 in competition with decomposition, and the decrease in the carbonyl and HCHO yields with increasing carbon number in the 1-alkenes 1-pentene through 1-octene suggests that isomerization of the intermediate β-hydroxyalkoxy radical is occurring.
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