M. Gowrisankar

Thermodynamic study of interactions in binary liquid mixtures of 2-Chloroaniline with some carboxylic acids

ABSTRACT Densities, speed of sound and dynamic viscosity of liquid mixtures of 2-Chloroaniline with carboxylic acids (ethanoic acid, propanoic acid and butanoic acid) have been calculated over the entire composition range and at T = (303.15–318.15) K. Changes in the physical properties have been studied as a function of temperature and alkyl chain length of carboxylic acids. By using density, speed of sound, viscosity data the excess molar volume (), excess isentropic compressibility (), excess Gibbs energy of activation flow () of liquid mixtures have been calculated. In addition, excess partial molar volume, , excess partial isentropic compressibility, , and excess partial molar volume, , excess partial isentropic compressibility, , at infinite dilution over the whole composition range have also been calculated. Further the topology of electron density obtained by non-covalent interaction plots are used to identify the evolution of strong and weak interactions between dimers of binary liquid mixtures.

Investigation of molecular interactions in binary mixtures of homologous series of aliphatic alcohols with 2-methoxyaniline at various temperatures

ABSTRACT Thermodynamic and transport properties (excess molar volume, excess isentropic compressibility and deviation in viscosity) are calculated from the experimental density, speed of sound and viscosity. The results are analysed in terms of rupture of hydrogen-bonded chain as the dipolar interaction between 2-methoxyaniline and 1-alkanol (1-hexanol, 1-heptanol and 1-octanol) exceeds the intermolecular interaction through dipole-dipole and hydrogen bonding between these unlike molecules. The VE results are analysed in the light of Prigogine-Flory-Patterson theory. Analysis of each of the three contributions viz. interactional, free volume and P* to VE has shown that interactional contribution are positive for all systems, the free volume effect and P* contribution are negative for all the mixtures.