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Reactions of hydroxyl radicals with trichloroethene and tetrachloroethene in argon matrices at 12 K

Wiltshire, K.S., Almond, M.J. and Mitchell, P.C.H. (2004) Reactions of hydroxyl radicals with trichloroethene and tetrachloroethene in argon matrices at 12 K. Physical Chemistry Chemical Physics, 6 (1). pp. 58-63. ISSN 1463-9076

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To link to this article DOI: 10.1039/b310495h

Abstract/Summary

Irradiation of argon matrices at 12 K containing hydrogen peroxide and tetrachloroethene using the output from a medium-pressure mercury lamp gives rise to the carbonyl compound trichloroacetyl chloride (CCl3CClO). Similarly trichloroethene gives dichloroacetyl chloride ( CCl2HCClO) - predominantly in the gauche form - under the same conditions. It appears that the reaction is initiated by homolysis of the O-O bond of H2O2 to give OH radicals, one of which adds to the double bond of an alkene molecule. The reaction then proceeds by abstraction of the H atom of the hydroxyl group and Cl-atom migration. This mechanism has been explored by the use of DFT calculations to back up the experimental findings. The mechanism is analogous to that shown by the simple hydrocarbon alkenes.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11706
Uncontrolled Keywords:GAS-PHASE REACTIONS, PREDICTING RATE CONSTANTS, LOW-TEMPERATURE, MATRICES, INFRARED-MATRIX, CARBON-DIOXIDE, MICROWAVE SPECTROSCOPY, EARTHS ATMOSPHERE, ISOLATION SPECTRA, ORGANIC-COMPOUNDS, OH RADICALS

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