Kinetic studies of the homogeneous abiotic reactions of several chlorinated aliphatic compounds in aqueous solution |
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| Institution: | 1. Department of Soil Science and Chemical Agriculture, University of Granada, 18071 Granada, Spain;2. Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK;3. Department of Earth Sciences & Laboratory for Space Research, The University of Hong Kong, Hong Kong, China;4. Department of Optics, University of Granada, 18071 Granada, Spain;5. Department of Marine Resources and Energy, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan |
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| Abstract: | The base mediated and neutral abiotic reactions of 4 chlorinated aliphatic compounds have been studied as a function of temperature and pH. Arrhenius parameters obtained for base mediated reactions were as follows: 1,1,2-trichloroethane, log10A=14.36±0.55, Ea=95.6±3.6 kJ/mol; 1,1,1,2-tetrachloroethane, log10A=14.56±0.33, Ea=101.4±2.1 kJ/mol; 1,2,3-trichloropropane, log10A=13.31±0.53, Ea=95.9±3.5 kJ/mol. For the neutral reaction of 2,3-dichloro-1-propene the Arrhenius parameters were log10A=10.2±1.3, Ea=98±9 kJ/mol. For 1,1,2-trichloroethane the product of the base mediated reaction was identified as 1,1-dichloroethene, in contrast to previous studies. 2,3-dichloro-1-propene was found as an intermediate in the base mediated reaction of 1,2,3-trichloropropane, with 2-chloro-2-propen-1-ol as the major final product. Results from the present study are compared to those found in previous work. |
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