Densities and Viscosities of Glycine, dl -α-Alanine, dl -α-Amino-n-butyric Acid, and l -Leucine in Aqueous 1,2-Propanediol Solutions at 298.15 K

Densities, ρ, and viscosities, η, of glycine, dl -α-alanine, dl -α-amino- n -butyric acid, and l -leucine in 1.0, 2.0, 4.0, and 6.0 mol·kg -1 aqueous 1,2-propanadiol solutions have been determined at 298.15 K. The partial molar volumes,, obtained from densities have been used to calculate the corresponding volumes of transfer, Δ t V ∞, at infinite dilution from water to different concentrations of aqueous 1,2-propanediol solutions for rationalizing various interations. The Jones−Dole equation has been fitted to the viscosity data to calculate B -coefficients. Results show that in the case of glycine and dl -α-alanine the ion−dipolar interactions are dominating while hydrophobic−hydrophobic and hydrophilic−hydrophobic interactions are also showing their predominant role in other cases.