Effect of temperature on volumetric behavior of glycine in aqueous mebicar (N-tetramethylglycoluril) at p ∼ 0.1 MPa

Densities for solutions of glycine in aqueous mebicar (N-tetramethylated bicyclic bisurea or glycoluril) have been determined using a hermetically sealed vibrating-tube densimeter, with an uncertainty of similar to 1.0 x 10(-5) g.cm(-3), at T = (278.15, 288.15, 298.15, and 308.15) K and p = (99.6 +/- 0.8) kPa. The solution molality have been ranged from (0.024 to 0.098) mol.kg(-1) for aqueous mebicar and from (0.05 to 0.50) mol.kg(-1) for amino acid being studied. These data have been used to calculate both concentration-dependent apparent and standard (partial at infinite dilution) volumes and expansibilities for glycine as a solute. Also, the hydration numbers of the amino acid and glycine-mebicar pairwise interaction coefficients have been derived from the standard molar volumes of the glycine transfer from water to aqueous mebicar over the whole temperature range chosen. The results have been explained based on the patterns of the glycine hydration and the solute-co-solute interactions. (C) 2017 Elsevier B.V. All rights reserved.