Thermochemical Investigations of Associated Solutions: 5. Calculation of Solute-Solvent Equilibrium Constants from Solubility in Mixtures Containing Two Complexing Solvents

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Article on thermochemical investigations of associated solutions and the calculation of solute-solvent equilibrium constants from solubility in mixtures containing two complexing solvents.

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5 p.

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Acree, William E. (William Eugene) & McCargar, James W. July 1, 1987.

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Article on thermochemical investigations of associated solutions and the calculation of solute-solvent equilibrium constants from solubility in mixtures containing two complexing solvents.

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5 p.

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Abstract: Solubilities are reported for carbazole in binary dibutyl ether plus 1 -chlorohexane mixtures at 25 °C. Results of these measurements are compared with solution models developed for solubility in systems containing specific solute-solvent interactions. A simple stoichiometric complexation model based on a 1:1 carbazole:dibutyl ether complex could describe the measured solubility to within an average absolute deviation of 1.7%. The calculated equilibrium constant, though, was about one-half of values previously determined from carbazole solubilities in several binary dibutyl ether plus alkane mixtures. A more sophisticated solution model, derived by assuming both 1:1 carbazole: dibutyl ether and carbazole:chlorohexane complexes, could describe the solubilities to within 2.4%. This latter model enables the carbazolechlorohexane association constant to be calculated from experimental carbazole solubilities and a priori knowledge of the carbazole-dibutyl ether equilibrium constant.

© 1987 by the American Pharmaceutical Association.

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  • Journal of Pharmaceutical Sciences, 1987, Washington D.C.: American Pharmaceutical Association, pp. 575-579

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  • Publication Title: Journal of Pharmaceutical Sciences
  • Volume: 76
  • Issue: 7
  • Page Start: 575
  • Page End: 579
  • Pages: 5
  • Peer Reviewed: Yes

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  • July 1, 1987

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  • Oct. 2, 2015, 9:40 a.m.

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Acree, William E. (William Eugene) & McCargar, James W. Thermochemical Investigations of Associated Solutions: 5. Calculation of Solute-Solvent Equilibrium Constants from Solubility in Mixtures Containing Two Complexing Solvents, article, July 1, 1987; [Washington, D.C.]. (digital.library.unt.edu/ark:/67531/metadc725814/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.