Thermodynamic study of interactions between 1-alkanol and butanone

Highlights: • Kirkwood Buff formalism for binary mixtures was reported. • Effect of alcohols chain length on different properties is discussed. • Molecular interactions are explained by related properties based on Kirkwood Buff integrals. -- Abstract: To obtain the new perspectives on the molecular interactions in the binary systems of butanone and a homologous series of 1-alkanol from 1-pentanol up to 1-decanol, these mixtures were studied using the Kirkwood–Buff (KB) formalism and preferential solvation analysis. The results were confirmed using the experimental excess molar volumes. KB integrals$G_{\mathrm{ij}}$, the excess or deficit number$\Delta n_{\mathrm{ij}}$, and solvation coefficients ${\delta }_{\mathrm{ij}}$are reported here. Analysis of obtained data regarding the KB formalism and preferential solvation reveals that interactions strength in mixtures depends on the butanone concentration and size of 1-alkanol. Also, interactions between similar molecules are remarkable and become stronger as the length of the alcohol increases. Furthermore, mixtures structure was studied using the concentration-concentration structure factor, $S_{\mathrm{CC}}\left(0\right)$. Results from application of this parameter show that the homocoordination occurs in solutions. Steric effects lead to the stronger orientations in the mentioned mixtures.