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

doi:10.1021/jp051249b

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

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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 language	English
Pages (from-to)	7751-7756
Number of pages	5
Journal	Journal of Physical Chemistry A
Volume	109
Issue number	34
DOIs	https://doi.org/10.1021/jp051249b
Publication status	Published - 1 Sept 2005

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title = "Rate coefficient measurements of hydrated electrons and hydroxyl radicals with chlorinated ethanes in aqueous solutions",

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. {\textcopyright} 2005 American Chemical Society.",

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TY - JOUR

T1 - Rate coefficient measurements of hydrated electrons and hydroxyl radicals with chlorinated ethanes in aqueous solutions

AU - Milosavljevic, Bratoljub H.

AU - La Verne, Jay A.

AU - Pimblott, Simon M.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - 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.

AB - 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.

U2 - 10.1021/jp051249b

DO - 10.1021/jp051249b

M3 - Article

SN - 1520-5215

VL - 109

SP - 7751

EP - 7756

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 34

ER -

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

Abstract

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