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Ionization constants and thermodynamic quantities of 2-mercaptocarboxylic acids in aqueous solution

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Abstract

The carboxylic acid ionization constants of mercaptoacetic acid (MAA), 2-mercaptopropionic acid (2-MPA), 2-mercaptoisobutyric acid (2-MIBA) and 2-mercaptosuccinic acid (2-MSA) have been measured in perchlorate media at an ionic strength of 1.0M and over the temperature range 273–309°K. Appropriate thermodynamic quantities have been derived. The variation in the temperature Tϑ at which the constants exhibit a maximum has been interpreted in terms of the effect of hydrophobic substituents on the extent of solvation of the participating species.

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Authors and Affiliations

  1. Chemistry Department, University of Glasgow, G12 8QQ, Glasgow, Scotland

    K. J. Ellis, A. G. Lappin & A. McAuley

  2. Department of Biochemistry, John Curtin School, of Medical Research, Australian National University, P. O. Box 4, 2600, Canberra, A.C.T., Australia

    K. J. Ellis

  3. Department of Chemistry, University of Victoria, V8W 2Y2, Victoria, B.C., Canada

    A. McAuley

Authors
  1. K. J. Ellis
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  2. A. G. Lappin
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  3. A. McAuley
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Ellis, K.J., Lappin, A.G. & McAuley, A. Ionization constants and thermodynamic quantities of 2-mercaptocarboxylic acids in aqueous solution. J Solution Chem 6, 183–190 (1977). https://doi.org/10.1007/BF00646737

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  • DOI: https://doi.org/10.1007/BF00646737

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