Volumetric studies of some amino acids in binary aqueous solutions of MgCl2.6H2O at 288.15, and 308.15 K

Journal of Chemical Sciences

Suresh Kumar¹  Amalendu Pal1¹ 

[1] Department of Chemistry, Kurukshetra University, Kurukshetra 136 119, India$$

关键词: Amino acids;    transfer functions;    cosphere overlap model;    interaction coefficients.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Densities (𝜌) of glycine, L-alanine, and L-valine in aqueous solutions of MgCl2.6H2O (0.1-0.8 mol kg-1) have been measured at 288.15, and 308.15 K. Apparent molar volumes (𝑉𝜙), and limiting partial molar volumes ($V^{0}_{phi}$) of each amino acid have been calculated. These data were combined with the earlier reported $V^{0}_{phi}$ values of glycine, L-alanine, and L-valine in aqueous MgCl2.6H2O solutions at 298.15 K in order to describe the temperature dependence behaviour of partial molar quantities. Group contributions to partial molar volumes have been determined for the amino acids. The trends of transfer volumes ($Delta V^{0}_{phi}$) have been interpreted in terms of solute-cosolute interactions on the basis of a cosphere overlap model. Pair and triplet interaction coefficients have also been calculated from transfer parameters.

【 授权许可】

Unknown