Ionization constants and thermodynamic quantities of 2-mercaptocarboxylic acids in aqueous solution |
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| Authors: | K J Ellis A G Lappin A McAuley |
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| Institution: | (1) Chemistry Department, University of Glasgow, G12 8QQ Glasgow, Scotland;(2) Department of Biochemistry, John Curtin School, of Medical Research, Australian National University, P. O. Box 4, 2600 Canberra, A.C.T., Australia;(3) Department of Chemistry, Purdue University, 47907 West Lafayette, Indiana;(4) Department of Chemistry, University of Victoria, V8W 2Y2 Victoria, B.C., Canada |
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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 T 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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| Keywords: | Ionization 2-mercaptocarboxylic acids thermodynamic |
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