Gas-phase reactions of nopinone, 3-isopropenyl-6-oxo-heptanal, and 5-methyl-5-vinyltetrahydrofuran-2-ol with OH, NO{sub 3}, and ozone
- European Commission, Ispra (Italy). Joint Research Centre
In the troposphere, {alpha}-pinene, {beta}-pinene, limonene, and linalool are mainly oxidized to pinonaldehyde, nopinone, 3-isopropenyl-6-oxoheptanal (IPOH), and 5-methyl-5-vinyltetrahydrofuran-2-ol (MVT), respectively. The rate constant of the reactions of nopinone, IPOH, and MVT with OH, NO{sub 3}, and O{sub 3} were determined by long path FT-IR spectroscopy, and the oxidation products from the reactions between the OH radical and pinonaldehyde, nopinone, IPOH, and MVT were investigated using GC-MS and HPLC. The reaction rate constants (k) for the reactions have been determined at 740 {+-} 5 Torr and 298 {+-} 5 K, and a number of reaction products were identified. From the results obtained in this investigation and previous studies, it was concluded that a typical atmospheric lifetime with respect to chemical reactions was only a few hours for pinonaldehyde, IPOH, and MVT but was much longer for nopinone with a lifetime of about 10 h.
- OSTI ID:
- 323810
- Journal Information:
- Environmental Science and Technology, Vol. 33, Issue 3; Other Information: PBD: 1 Feb 1999
- Country of Publication:
- United States
- Language:
- English
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