Thermodynamics of molecular interactions in mixtures containing ether

Molar excess volumes, V-E and molar excess enthalpies, H, for 1,3-dioxolane(i) + benzene or toluene or + -o, or + -p or +m - xyleneo(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 V: data by Graph-theoretical approach suggest that various (i+j) mixtures are characterized by interactions between delocalised pi-electron cloud of aromatic ring of aromatic hydrocarbons and pi 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 V-E and H-E data calculated by Graph theory compare well with their experimental values.