TITRATION CALORIMETRIC DETERMINATION OF THE PAIRWISE INTERACTION PARAMETERS OF GLYCEROL, D-THREITOL, MANNITOL, AND D-GLUCITOL IN DILUTE AQUEOUS-SOLUTIONS

Enthalpic pairwise interaction parameters, h(jj), were determined by titration calorimetry at 25 degrees C for dilute solutions of glycerol, D-threitol, mannitol, and D-glucitol in water. The parameters for these and other polyols conform to the expression h(jj) (J-kg(-1)) = 145 + 135n(OH) - 21.5n(OH)(2) - 41.7n(dl)(2) - 160.5n(dlld), where n(OH) = n(C) is the number of hydroxyl groups (carbon atoms), n(dl) is the number of dl configuration of a vicinal pair of OH-groups, and n(dlld) is the number of such configurations in the polyol molecules. A rationalization of this expression is given.