Study of Intermolecular Interactions in Binary Mixtures of 2‑Methoxyaniline with Chlorinated Ethanes at Various Temperatures

Densities (ρ), speeds of sound (u), and viscosities (η) are reported for binary mixtures of
2-methoxyaniline with chlorinated ethane components (1,2-dichloroethane, 1,1,2-trichloroethane
and 1,1,2,2-tetrachloroethane) over the entire composition range of mole fraction
at T = (303.15–313.15) K and at atmospheric pressure (0.1 MPa). The excess properties:
excess molar volume, excess isentropic compressibility and deviation in viscosity are calculated
from the experimental density, speed of sound and viscosity. Excess properties are
correlated using the Redlich–Kister polynomial equation. The excess partial molar volumes
and excess partial molar isentropic compressibilities are calculated for all the binary systems
throughout the composition range and at infinite dilutions. The results are analyzed
in terms of electron donor–acceptor interactions leading to the formation of intermolecular
complexes and hydrogen bonding between 2-methoxyaniline and chlorinated ethane
molecules. The VE results are analyzed in light of the Prigogine–Flory–Patterson theory.
Analysis of each of the three contributions viz. interactional, free volume and P* to VE has
shown that the interactional contribution are positive for all studied systems, the free volume
and P* contributions are negative for all the binary mixtures.