Studies on Associated Solutions: Thermodynamic Parameters of Binary Liquid Mixtures of Propiophenone and o-Substituted Anilines

The densities (rho), speeds of sound (u), and viscosities (eta) are reported for binary mixtures of propiophenone with ortho-substituted aniline (2-chloroaniline, 2-methylaniline, and 2-methoxyaniline) over the entire composition range from 303.15 to 318.15 K and at atmospheric pressure 0.1 MPa. The excess/deviation functions (V-E, k(E), and Delta eta) are calculated from the measured densities, speeds of sound and viscosities at experimental temperatures. The excess properties have been analyzed through molecular interactions. The FT-IR data indicate that the formation of intermolecular hydrogen bonding (N-H center dot center dot center dot O-H) between hydrogen atom of amine group of o-substituted aniline and oxygen atom of carbonyl of propiophenone in the binary liquid mixtures.