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Rate constants for the gas-phase reactions of O3 with a series of carbonyls at 296 K

✍ Scribed by Roger Atkinson; Sara M. Aschmann; Arthur M. Winer; James N. Pitts Jr.

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
426 KB
Volume
13
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

Rate constants for the gas‐phase reactions of O~3~ with the carbonyls acrolein, crotonaldehyde, methacrolein, methylvinylketone, 3‐penten‐2‐one, 2‐cyclohexen‐1‐one, acetaldehyde, and methylglyoxal have been determined at 296 ± 2 K. The rate constants ranged from <6 × 10^−21^ cm^3^ molecule^−1^ s^−1^ for acetaldehyde to 2.13 × 10^−17^ cm^3^ molecule^−1^ s^−1^ for 3‐penten‐2‐one. The substituent effects of CHO and CH~3~CO groups on the rate constants are assessed and discussed, as are implications for the atmospheric chemistry of the natural hydrocarbon isoprene.

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Using a relative rate technique, rate constants for the gas-phase reactions of the OH radical with the three cresols and the six dimethylphenols have been determined a t 296 t 2 K and atmospheric pressure. The rate constants for the cresols, which range from 4.3 x lo-" cm3 molecule-' s-' to 6.8 x lo