Thermochemical investigations of hydrogen-bonded solutions. Part 11. Expressions for predicting anthracene solubilities in alcohol+alkoxyalcohol mixtures based on mobile order theory |
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Authors: | Mary E R McHale Joyce R Powell Ann-Sofi M Kauppila William E Acree Jr Pierre L Huyskens |
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Institution: | (1) Department of Chemistry, University of North Texas, 76203-0068 Denton, Texas;(2) Department of Chemistry, Celestijnenlaan 200F, B-3001 Heverlee, Belgium |
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Abstract: | Experimental solubilities are reported for anthracene dissolved in eight binary mixtures containing 2-ethoxyethanol with 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1-propanol, 1-pentanol, 3-methyl-1-butanol and 1-octanol, and also in binary 1-pentanol+2-methoxyethanol and 2-methyl-1-propanol+2-propoxyethanol solvent systems at 25°C. Results of these measurements, combined with previously reported anthracene solubility data in 22 different alcohol +2-alkoxyethanol (2-methoxyethanol, 2-propoxyethanol and 2-butoxyethanol) solvent mixtures, are used to test the limitations and applications of expressions derived from Mobile Order theory. The first predictive expression assumes only formation of homogeneous self-associated hydrogen-bonded species, whereas the second equation includes additional terms to account for heterogeneous complex formation between the dissolved alcohol and 2-alkoxyethanol solvent molecules. Both equations predict the observed anthracene solubilities to within an average absolute deviation of about 3%. |
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Keywords: | Anthracene solubilities hydrogen-bonding self-association solid-liquid equilibria binary alcohol+alkoxyethanol solvent mixtures |
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