Rate coefficient measurements of hydrated electrons and hydroxyl radicals with chlorinated ethanes in aqueous solutions

Bratoljub H. Milosavljevic, Jay A. La Verne, Simon M. Pimblott

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Rate coefficients for the reactions of hydrated electrons and hydroxyl radicals with various chloroethanes were determined in aqueous solutions using pulse radiolysis techniques. The rate coefficients for the hydrated electron increase from 0.17 × 10 9 to 16.3 × 10 9 M -1 s -1 with increasing number of chlorine atoms from monochloroethane to hexachloroethane. Very little difference in rates is found between the isomers. Rate coefficients for the OH radicals range from 1 to 5 × 10 8 M -1s -1 and have very little variation with the number of chlorine atoms except when no H atom is available on a carbon atom. The use of competition kinetics with low concentrations of SCN - as a reference is reviewed and suitable model simulations proposed. Possible explanations for the discrepancies between the previously published rate coefficients and the present values are offered. © 2005 American Chemical Society.
    Original languageEnglish
    Pages (from-to)7751-7756
    Number of pages5
    JournalJournal of Physical Chemistry A
    Volume109
    Issue number34
    DOIs
    Publication statusPublished - 1 Sept 2005

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