Free Radical Induced Degradation of 1, 2-Dibromoethane. Generation of Free Br+Atoms
- 1 January 1986
- journal article
- Published by Taylor & Francis in Free Radical Research Communications
- Vol. 1 (4) , 235-241
- https://doi.org/10.3109/10715768609051633
Abstract
Free Br. atoms have been found to be generated upon eaq- and .OH radical induced degradation of 1,2-dibromoethane in aqueous solution. The relevant process is beta-bromine cleavage from CH2BrCH2 and CH2BrCHBr radicals, respectively. An absolute rate constant of k = 2.8 x 10(6) s-1 has been determined for the reaction CH2BrCH2----Br. + CH2 = CH2, while an estimate of k approximately 10(6) s-1 can be given for CH2BrCHBr----Br. + CH2 = CHBr. The Br. atoms have been identified through their reaction with Br- to Br2-. (k = 7.7 x 10(9) mol-1dm3s-1) and their reaction with 2,2'-azinobis (3-ethylbenzthiazoline-6-sulphonate) (k = 6.8 x 10(9) mol-1dm3s-1). Ethylene and vinyl bromide have been identified via GC. The results substantiate earlier findings that free radical induced mechanisms can serve as informative probe for metabolic processes.Keywords
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