Journal of Solution Chemistry

, Volume 23, Issue 10, pp 1101–1109 | Cite as

Solvent effects on the dissociation of aliphatic carboxylic acids in water-N,N-dimethylformamide mixtures: Correlation between acidity constants and solvatochromic parameters

  • R. J. Sindreu
  • M. L. Moyá
  • F. Sánchez Burgos
  • A. G. González


The acid dissociation constants of nine aliphatic carboxylic acids in several N,N-dimethylformamide-water mixtures were subjected to factor analysis (FA) and two solvent factors emerged. A further target factor analysis (TFA) indicated that the Kamlet and Taft general equation is reduced in these mixtures to two terms: the independent one and that related to the hydrogen bond acceptor (HBA) basicity β solvatochromic parameter. Accordingly, an excellent correlation is found between the logarithmic values of the acidity constants of each acid in the binary mixtures and their corresponding β values.

Key Words

Binary mixtures N,N-dimethylformamide-water solvatochromic parameters acidity constants factor analysis 


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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • R. J. Sindreu
    • 1
  • M. L. Moyá
    • 1
  • F. Sánchez Burgos
    • 1
  • A. G. González
    • 2
  1. 1.Department of Physical ChemistryUniversity of SevilleSevilleSpain
  2. 2.Department of Analytical ChemistryUniversity of SevilleSevilleSpain

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