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Kinetics of isotopic exchange between chloramine-B and radioactive chloride

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Abstract

The kinetics of chlorine isotope exchange between chloramine-B /CAB/ and chloride has been studied using ion-exchange separation and tracer technique. McKay's plot are linear. The exchange reaction is fast in acidic medium, very slow in neutral medium and does not take place in alkaline medium. In the acidic range the exchange is maximum at pH 3.3. The rate of exchange decreases at pH >3.3 and <3.3. The order with respect to CAB and chloride is unity. The order with respect to [H+] is unity at pH>5. Addition of neutral salt or parent compound has no effect on the rate of exchange. Activation energy and activation entropy for this exchange reaction have been calculated.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology, 600 036, Madras, India

    M. Subhashini, M. S. Subramanian & V. R. S. Rao

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  1. M. Subhashini
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  2. M. S. Subramanian
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  3. V. R. S. Rao
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Subhashini, M., Subramanian, M.S. & Rao, V.R.S. Kinetics of isotopic exchange between chloramine-B and radioactive chloride. Journal of Radioanalytical and Nuclear Chemistry Letters 135, 359–371 (1989). https://doi.org/10.1007/BF02163429

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  • DOI: https://doi.org/10.1007/BF02163429

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