Some Experimental and Theoretical Studies of Molecular Interactions Prevailing in Cyclic Diether + 1-alkanols Binary Liquid Mixtures Through Ultrasonic Measurements

The density, viscosity and sound velocity for binary mixtures of 1,3-dioxolane + pentanol, 1,3-dioxolane + hexanol, 1,3-dioxolane + heptanol, 1,3-dioxolane + octanol, 1,3-dioxolane + nonanol and 1,3-dioxolane + decanol have been measured at the temperature 298.15 K, are conducted at atmospheric pressure. From these experimental values, various thermodynamic and excess thermodynamic properties were calculated. The adiabatic compressibility (β<sub>ad</sub>), excess adiabatic compressibility (β<sub>ad</sub><sup>E</sup>), inter molecular free length (L<sub>f</sub>), excess inter molecular free length (L<sub>f</sub><sup>E</sup>), enthalpy (H), excess enthalpy (H<sup>E</sup>), free volume (V<sub>f</sub>), excess free volume (V<i><sub>f</sub></i><sup>E</sup>)), internal pressure (P<sub>i</sub>), excess internal pressure (p<sub>i</sub><sup>E</sup>) have been in vestigated from density (ρ), viscosity (η) and sound velocity (u) measurements of six binary liquid mixtures of 1,3-Dioxolane with pentanol, hexanol, heptanol, octanol, nonanol and decanol over the entire composition range of mole fractions at 298.15K. An excess values of adiabatic compressibility (<i>β</i><sub>ad</sub><sup>E</sup>), inter molecular free length (L<sub>f</sub><sup>E</sup>)), excess enthalpy (H<sup>E</sup>), excess free volume (L<sub>f</sub><sup>E</sup>) and excess internal pressure (p<sub>i</sub><sup>E</sup>) were plotted against the mole fraction of 1,3-dioxolane over the whole composition range. The excess properties are found to be negative depending on the molecular interactions and the nature of the liquid mixtures. The systems studied exhibit very strong cross association through hydrogen bonding.