Studies on the interaction between α-amino acids with polar side-chains and heterocyclic compounds at T=298.15 K

Mixing enthalpies of aqueous l-serine and l-threonine solutions and aqueous tetrohydrofuran (THF) and 1,4-dioxane solutions and their dilution enthalpies have been determined with a Thermometric-2277 Thermal Activity Monitor at T=298.15 K. The h xy values, obtained with the McMillan–Mayer formalism,...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2004-06, Vol.36 (6), p.483-490
Main Authors: Yu, Li, Hu, Xin-Gen, Lin, Rui-Sen, Xu, Gui-Ying
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
General. Theory
Heterocyclic compound
Heterotactic enthalpic pairwise interaction coefficient
SWAG approach
α-Amino acid
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Summary:Mixing enthalpies of aqueous l-serine and l-threonine solutions and aqueous tetrohydrofuran (THF) and 1,4-dioxane solutions and their dilution enthalpies have been determined with a Thermometric-2277 Thermal Activity Monitor at T=298.15 K. The h xy values, obtained with the McMillan–Mayer formalism, for the α-amino acids bearing polar side-chain ( l-serine and l-threonine) with THF and 1,4-dioxane are compared with values reported in the literature for the α-amino acids with non-polar side-group (glycine, l-alanine, l-aminobutyric acid and l-valine) with THF and 1,4-dioxane. The results are interpreted in terms of solute–solute interactions. The group additivity concept by Savage and Wood (SWAG) has also been used. Contributions of each amino acid, functional group have been estimated.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2004.02.010