Excess molar volumes of binary mixtures of 1,3-dimethylimidazolidin-2-one with an alkan-1-ol at the temperatures 283.15 K, 298.15 K, and 313.15 K

Excess molar volumes V m E for (1,3-dimethylimidazolidin-2-one + an alkan-1-ol from methanol to octan-1-ol) have been determined from density measurements at T = (283.15, 298.15, and 313.15) K over the whole composition range. The V m E values for the mixtures of 1,3-dimethylimidazolidin-2-one with methanol show the most negative ones at any composition and V m E values for (1,3-dimethylimidazolidin-2-one + an alkan-1-ol) at each temperature varies systematically from negative to positive with an increase in carbon number ν in alkan-1-ols. The ν dependence of V m E ( x 1 = 0.5 ) values for the equimolar mixtures of (1,3-dimethylimidazolidin-2-one + an alkan-1-ol) is very similar to that of (1,1,3,3-tetramethylurea + an alkan-1-ol) at 298.15 K. From the temperature dependence of V m E ( x 1 = 0.5 ) values for the equimolar mixtures of 1,3-dimethylimidazolidin-2-one with an alkan-1-ol, the coefficient ( ∂ V m E ( x = 0.5 ) / ∂ T ) p was evaluated for each mixture and its dependence of ν was also studied.