Aqueous solutions containing amino acids and peptides. Part 21. The enthalpic coefficients at 298.15 K for the interaction of N-acetyl-l

Add time:08/04/2019    Source:sciencedirect.com

Enthalpies of dilution of N-acetyl-l-prolinamide and equimolal solutions of this with N-acetylglycinamide, N-acetyl-l-alaninamide, N-acetyl-l-valinamide and N-acetyl-l-leucinamide have been determined at 298.15 K using a microcalorimetric procedure. The results obtained were used to calculate the pairwise enthalpic virial coefficients for both like—like (homotactic) and like—unlike (heterotactic) solute interactions. It is shown that the data can be predicted rather well using a group additivity approach with parameters obtained from earlier studies on α-amino and α-imino acid derivatives.

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