Thermochemical Investigations of Associated Solutions: Comparison of PAH-chlorobutane Versus PAH-dichlorobutane Equilibrium Constants calculated from Solubility Data
- 1 September 1991
- journal article
- research article
- Published by Taylor & Francis in Physics and Chemistry of Liquids
- Vol. 23 (4) , 225-237
- https://doi.org/10.1080/00319109108027259
Abstract
Experimental solubilities are reported for anthracene dissolved in binary solvent mixtures containing 1,4-dichlorobutane with n-heptane, n-octane, cyclohexane and methylcyclohexane at 25°C. Results of these measurements, combined with estimates for the excess Gibbs free energies of the binary solvents, are used to evaluate the equilibrium for a presumed anthracene-dichlorobutane molecular complex using the Extended NIBS model. The calculated equilibrium constant is compared to published values for anthracene-chlorobutane and pyrene-dichlorobutane. Differences in the values for the various polycyclic aromatic hydrocarbons (PAHs) and mono/dichlorobutanes are rationalized at the molecular level in terms of individual microscopic equilibrium constants for distinguishable association species.Keywords
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