Abstract
The solubilities of diphenylglyoxal were determined between 15 and 45°C in eight non-polar organic solvents and compared with theoretical values calculated from calorimetric data, following the regular solution theory. Entropy data obtained show that solvent-solute interactions take place in some of the solvents, increasing solubility and resulting in deviations from regular solution behaviour. Solvents can be divided in two groups, one of which gives “regular solutions” of diphenylglyoxal. In all cases the observed solubility approaches that predicted as the temperature rises.
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