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Rate constants for the gas-phase reactions of O3 with a series of cycloalkenes and α,β-unsaturated ketones at 296 ± 2 K

✍ Scribed by Chipper R. Greene; Roger Atkinson

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
444 KB
Volume
26
Category
Article
ISSN
0538-8066

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✦ Synopsis

The kinetics of the gas-phase reactions of 0 3 with a series of alkenes and two a , p-unsaturated ketones have been investigated at atmospheric pressure (ca. 740 torr) of air and 296 f 2 K, using a relative rate method in the presence of sufficient cyclohexane to scavenge OH radicals generated in these reactions. Combined with our previous relative rate measurements (Int. J. Chem. Kinet., 24,803 (1992)), the rate constants obtained relative to K(O3 + propene) = 1.00 were: 3-penten-2-one, 3.62 ? 0.16; 2-cyclohexen-1-one, < 0.19; bicyclo[2.2.2]-2-octene, 7.44 f 0.48; 1,3-cycloheptadiene, 16.1 f 1.1; cycloheptene, 23.7 2 1.6; 1,3cyclohexadiene, 134 ? 13; bicycl0[2.2.11-2-heptene, 170 ? 16; and bicyclo[2.2.1]-2,5-heptadiene, 390 2 36. The resulting rate constants then lead to a self-consistent set of room temperature data for the reactions of O3 with these alkenes and a, p-unsaturated ketones. These rate constants are compared with the literature data, and the effects of ring size discussed.

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## Abstract Rate constants for the gas‐phase reactions of O~3~ with ethene, propene, 1‐hexene, 1‐heptene, styrene, __o__‐, __m__‐, and __p__‐cresol, __o__‐ and __m__‐xylene, benzylchloride, acrylonitrile, and trichloroethene have been determined at 296 ± 2 K. The rate constants ranged from <5 × 10^

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Using a relative rate method, rate constants have been determined at 296 5 2 K for the gas-phase reactions of the OH radical with toluene, the xylenes, and the trimethylbenzenes. Using the recommended literature rate constant for the reaction of OH radicals with propene of (2.66 2 0.40) x lo-" cm3 m

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## Abstract Relative rate constants for the reaction of OH radicals with a series of ketones have been determined at 299 ± 2 K, using methyl nitrite photolysis in air as a source of hydroxyl radicals. Using a rate constant for the reaction of OH radicals with cyclohexane of 7.57 × 10^−12^ cm^3^ mol

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Rate constants for the gas-phase reactions of the OH radical with the cresols and dimethylphenols at 296 ± 2K
✍ Roger Atkinson; Sara M. Aschmann 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 444 KB 👁 1 views

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