Efficiency of hydroxyl groups in promoting hydrophobic interactions. A calorimetric study of ternary aqueous solutions of alkan-1-ols and alkane-m,n-diols

✍ Scribed by Giuseppina Castronuovo; Vittorio Elia; Silvia Perez-Casas; Filomena Velleca

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 595 KB
• Volume: 88
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(00)00151-3

✦ Synopsis

Heats of dilution of ternary aqueous solutions containing alkan-l-ols and aikane-1,2-diols or alkane-ct,o~-diols have been determined at 298.15 K by flow microcalorimetry. The pairwise interaction coefficients of the virial expansion of the excess enthalpies were evaluated and compared to those formerly obtained for binary aqueous solutions of alkan-m-ols or alkane-m,n-diols. The results were interpreted using the "preferential configuration" model, namely in terms of preferential interactions between hydrophilic domains and of repulsive interactions between hydrophobic and hydrophilic domains. Hydroxyl groups present a different efficiency in promoting hydrophobic interactions in dependence of their number and position in the interacting molecules.