Atmospheric chemistry of C3-C6 cycloalkanecarbaldehydes.
The rate coefficients for the gas phase reaction of NO3 and OH radicals with a series of cycloalkanecarbaldehydes have been measured in purified air at 298 +/- 2 K and 760 +/- 10 Torr by the relative rate method using a static reactor equipped with long-path Fourier transform infrared (FT-IR) detection. The values obtained for the OH radical reactions (in units of 10(-11) cm3 molecule(-1) s(-1)) were the following: cyclopropanecarbaldehyde, 2.13 +/- 0.05; cyclobutanecarbaldehyde, 2.66 +/- 0.06; cyclopentanecarbaldehyde, 3.27 +/- 0.07; cyclohexanecarbaldehyde, 3.75 +/- 0.05. The values obtained for the NO3 radical reactions (in units of 10(-14) cm3 molecule(-1) s(-1)) were the following: cyclopropanecarbaldehyde, 0.61 +/- 0.04; cyclobutanecarbaldehyde, 1.99 +/- 0.06; cyclopentanecarbaldehyde, 2.55 +/- 0.10; cyclohexanecarbaldehyde, 3.19 +/- 0.12. Furthermore, the reaction products with OH radicals have been investigated using long-path FT-IR spectroscopy and proton-transfer-reaction mass spectrometry (PTR-MS). The measured carbon balances were in the range 89-97%, and the identified products cover a wide spectrum of compounds including nitroperoxycarbonyl cycloalkanes, cycloketones, cycloalkyl nitrates, multifunctional compounds containing carbonyl, hydroxy, and nitrooxy functional groups, HCOOH, HCHO, CO, and CO2.
D'Anna
Barbara
B
Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway. barbara.danna@kjemi.uio.no
Wisthaler
Armin
A
Andreasen
Øyvind
Ø
Hansel
Armin
A
Hjorth
Jens
J
Jensen
Niels R
NR
Nielsen
Claus J
CJ
Stenstrøm
Yngve
Y
Viidanoja
Jyrki
J
D000393:Air Pollutants / Q000737:chemistry; D000447:Aldehydes / Q000737:chemistry*; D000473:Alkanes / Q000737:chemistry*; D001272:Atmosphere / Q000737:chemistry*; D003500:Cyclization; D017665:Hydroxyl Radical / Q000737:chemistry; D007700:Kinetics; D015394:Molecular Structure; D010084:Oxidation-Reduction; D017550:Spectroscopy, Fourier Transform Infrared
D000393:Air Pollutants; D000447:Aldehydes; D000473:Alkanes; D017665:Hydroxyl Radical