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Rate constants for the gas-phase reactions of O3 with a series of alkenes at 296 ± 2 K

✍ Scribed by Chipper R. Greene; Roger Atkinson

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
523 KB
Volume
24
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 have been investigated at atmospheric pressure (ca. 740 torr) of air and 296 2 2 K, using a relative rate method in the presence of sufficient n-octane to scavenge any OH radicals generated in these reactions. Relative to k(Os + propene) = 1.00, the rate constants obtained were: l-butene, 0.975 2 0.030; 2methylpropene, 1.14 ? 0.04; 2-methyl-l,3-butadiene (isoprene), 1.21 2 0.02; 1,4-cyclohexadiene, 4.75 t 0.23; cyclohexene, 7.38 t 0.48; cis-2-butene, 12.8 2 0.8; trans-2-butene, 21.5 2 1.5; 2methyl-2-butene, 42.1 t 2.8; cyclopentene, 64.9 t 4.3; and 2,3-dimethyl-2-butene, 123 2 11. These relative rate constants have been placed on a n absolute basis using a rate constant for the reaction of O3 with propene of 1.01 X cm3 molecule-'^-^ a t 296 K derived from an analysis of the available literature data. The resulting rate constants then lead to a self-consistent set of room temperature data for the reactions of 0 3 with these alkenes. 0 1992

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