Aqueous solutions containing amino acids and peptides. Part 19: The enthalpic coefficients for the interactions of N-acetylsarcosinamide with 2-(N-acetylamino)acyl amides at 25°C |
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Authors: | G Michael Blackburn Terence H Lilley Peter J Milburn |
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Institution: | (1) Chemistry Department, The University, S3 7HF Sheffield, UK;(2) Present address: Chemistry Department, Baker Laboratory, Cornell University, 14853 Ithaca, NY |
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Abstract: | Enthalpies of dilution both of solutions of N-acetylsarcosinamide and of ternary solutions equimolal in N-acetylsarcosinamide and N-acetylglycinamide, N-acetyl-L-alaninamide, N-acetyl-L-valinamide or N-acetyl-L-leucinamide have been determined by a microcalorimetric method. The results were employed to calculate the pairwise enthalpic coefficients for both homotactic (like-like) and heterotactic (like-unlike) solute interactions. These pairwise interaction coefficients have been analyzed by means of a group additivity approach and some comments on the utility of this, when applied to such systems, are made. |
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Keywords: | Group additivity amino acids aqueous solutions enthalpy of dilution |
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