Thermodynamics of molecular interactions in mixtures containing ether

Abstract

Molar excess volumes, <i>V^E</i> and molar excess enthalpies, <i>H^E, </i>for 1,3-dioxolane(i) + benzene or toluene or + <i>-o, </i>or + <i>-p </i>or <i>+m -</i> xylene(j) binary mixtures have been measured by dilatometer and microflow calorimeter as a function of composition at the temperature 298.15K. The observed data have been analysed in terms of (i) the Graph-theoretical approach, (ii) Flory's approach and (iii) Sanchez and Lacombe's theory. The analysis of <i>V^E</i> data by Graph-theoretical approach suggest that various (i+j) mixtures are characterized by interactions between delocalised π-electron cloud of aromatic ring of aromatic hydrocarbons and π<i> </i>electrons of oxygen atoms in 1,3-dioxolane. The IR studies lend further credance to the nature and extent of interactions with support for the proposed structures in studied mixtures. It has also been observed that <i>V^E</i> and <i>H^E </i>data calculated by Graph theory compare well with their experimental values.