Enthalpic and entropic contributions to substituent effects on the ionization of meta- and para-chlorobenzoic acids in water-dimethylsulfoxide mixtures at 25°C |
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| Authors: | Fabrizio Rodante |
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| Institution: | Istituto di Chimica della Facoltà di Ingegneria, Università di Roma, via del Castro Laurenziano 7, Rome Italy |
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| Abstract: | Separate enthalpic and entropic contributions to substituent effects on the dissociation of m- and p-chlorobenzoic acids in water-dimethylsulfoxide mixtures ranging from 0 to 0.8 mole fraction DMSO are presented.The effect of the medium on the substituent and reaction constants for the ionization processes is explained in terms of solute-solvent interactions and related structure breaking. |
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