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A relative rate study of the reaction of bromine atoms with a variety of organic compounds at 295 K

✍ Scribed by Timothy J. Wallington; Loretta M. Skewes; Walter O. Siegl; Steven M. Japar

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 451 KB
Volume: 21
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550211108

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✦ Synopsis

The relative rate technique has been used to determine rate constants for the reaction of bromine atoms with a variety of organic compounds. Decay rates of the organic species were measured relative to z-butane or acetaldehyde or both. Using rate constants of 1.74 x and 3.5 x lo-'' cm3 rnolecule-'s-' for the reaction of Br with z-butane and acetaldehyde respectively, the following rate constants were derived, in units of cm' molecule-' s-': 2,3-dimethylbutane, (6.40 t 0.77) X cyclopentane, (1.16 2 0.18) X propene, (3.85 t 0.41) X lo-''; trans-2butene, (9.50 t 0.76) x lo-'*, acetylene, (5.15 ? 0.19) x 10 15; and propionaldehyde, 19.73 t 0.91) x lo-". Quoted errors represent 2a and do not include possible systematic errors due to errors in the reference rate constants. Experiments were performed at 295 t 2 K and atmospheric pressure of synthetic air or nitrogen. The results are discussed with respect to the mechanisms of these reactions and their utility in serving as a laboratory source of alkyl and alkyl peroxy radicals. ethene, ( ~2 . 3

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