Influence of carbonyl group on thermodynamic and transport properties of binary liquid mixtures of 2-methoxyaniline with ketones at various temperatures

Abstract

Abstract The densities (ρ), viscosities (η) and speeds of sound (u) are reported for binary mixtures of 2-methoxy aniline with methyl ethyl ketone (MEK), methyl propyl ketone (MPK), diethyl ketone (DEK) and 2,6-dimethyl cyclohexanone (CH) over the entire composition range from 303.15 K to 318.15 K and at atmospheric pressure 0.1 MPa. The excess/deviation functions (VE, κsE and Δη) are calculated from the densities, speeds of sound and viscosities at experimental temperatures. The variation of these properties with composition of the mixtures suggests hydrogen bond, dipole–dipole interactions and charge–transfer complex formation between 2‑methoxy aniline and dipolar ketones. The VE results have been analyzed in the light of Prigogine-Flory–Patterson theory. An analysis of each of the three contributions viz. interactional, free volume and P* to VE shows that interactional contribution is positive for all binary systems. The free volume effect and P* contribution are negative for all the mixtures.