Abstract
Mobile Order theory, which has been used previously to describe the solubility behavior of anthracene and pyrene in binary alkane + alcohol and alcohol + alcohol solvent mixtures, is extended to ternary solvent systems containing alkane and alcohol cosolvents. Expressions are derived for both inert solutes and for systems that have solute-solvent association. Applications and limitations of the newly derived equations were assessed using published anthracene solubility data in 20 different ternary solvent systems. The best expression predicted the observed values to within an overall average absolute deviation of approximately 4.5% using a value of 5,000cm3 mol−1for all alcohol self-association and cross-association stability constants, and a value of 125cm3mol−1 for the presumed anthracene-alcohol association constant.
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