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Rate constants for the reactions of OH radicals with alkyl substituted olefins

✍ Scribed by Tomohiro Ohta

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 417 KB
Volume: 16
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550160708

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✦ Synopsis

Relative rate constants for the reactions of hydroxyl radicals with a series of alkyl substituted olefins were measured by competitive reactions between pairs of olefins a t 298 r 2 K and 1 atmospheric pressure. Hydroxyl radicals were produced by the photolysis of H,O, with 254-nm irradiation. The obtained rate constants were ( x 10 'I cm3 molecule-' s-'): 2.53 z 0.06, propylene; 5.49 z 0.17, cis-2-butene; 5.47 -C 0.1, isobutene; 6.46 z 0.13, 2-methyl-1-butene; 6.37 2 0.16, cis-2-pentene; 6.23 z 0.1, 2-methyl-1-pentene; 8.76 z 0.14, 2-methyl-2-pentene; 6.24 -c 0.08, trans-4-methyl-2-pentene; 10.3 z 0.1, 2.3dimethyI-2-butene; 9.94 -C 0.1, 2,3dimethyl-2-pentene; 5.59 z 0.07, trans-4,4-dimethyl-2-pentene. A trend in alkyl substituent effect on the rate constant was found, which is useful to predict koH on the basis of the number of alkyl substituents on the double bond.

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