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https://accedacris.ulpgc.es/handle/10553/71723
Título: | Solute-solvent interactions in amide-water mixed solvents |
Autores/as: | Garcia, B Alcalde, R Leal, JM Matos, JS |
Clasificación UNESCO: | 221030 Soluciones |
Palabras clave: | Excess Molar Volumes Binary-Mixtures Liquid-Mixtures Viscosities Chloroform, et al. |
Fecha de publicación: | 1997 |
Publicación seriada: | Journal of Physical Chemistry B |
Resumen: | Excess volumes, mixing viscosities, and excess Gibbs energies of activation of viscous flow of the aqueous binary mixtures of the amides formamide, N-methylformamide, N,N-dimethylformamide, pyrrolidin-2-one, and N-methyl-2-pyrrolidinone were calculated from density and viscosity measurements. The values of these functions point to strong amide-water interactions with formation of a variety of aggregates, the nature of which depends on the extent of substitution of the amides; comparison of the functions of the same amides with alkan-1-ols reveal an important hydration effect. Various one-parameter and two-parameter empirical models for prediction of mixing viscosities were in good agreement with the experimental results only for the formamide-water system; none of the models predicted satisfactorily the behavior for the aqueous mixtures of both mono-and disubstituted amides. |
URI: | https://accedacris.ulpgc.es/handle/10553/71723 |
ISSN: | 1520-6106 |
DOI: | 10.1021/jp9626374 |
Fuente: | Journal Of Physical Chemistry B [ISSN 1520-6106], v. 101 (40), p. 7991-7997, (Octubre 1997) |
Colección: | Artículos |
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