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Ultrasonic investigations in ternary liquid mixtures of substituted benzenes with acetophenone at different temperatures

The ultrasonic velocity, density and viscosity have been measured for the ternary mixtures of substituted benzenes such as chlorobenzene, bromobenzene and nitrobenzene with acetophenone in 1-butanol at 303, 308 and 313 K. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (β), free length (L f ), free volume (V f ), internal pressure (π i ), acoustic impedance (Z) and molar volume (V m ). Some of the above excess parameters have been evaluated and fitted to Redlich-Kister polynomials. It is eventually observed that molecular association between acetophenone and 1-butanol is through hydrogen bonding and substituted benzenes through strong dipole-dipole interactions. The formation of donor-acceptor complexes also observed in the present study.