Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

The thermodynamic parameters viz. excess molar volume VE and ultrasonic speed u, transport parameter viscosity g, and spectroscopic parameters viz. IR, 1H, 13C NMR have been measured for the mixtures of isomeric butanediol (1,2-, 1,3-, 1,4- and 2,3-butanediol) and N,N-dimethylformamide over the whole composition range at 308.15 K. The partial molar quantities QEi, isentropic compressibility KE S , deviation in ultrasonic velocity uD, viscosity deviation Dg, deviation in Gibbs energies of activation for viscous flow g(x), and excess NMR chemical shift dE have also been estimated and analyzed. Results show that the interaction between unlike molecules takes place through hydroxyl groups of isomeric butanediol and >CO group of N,N-dimethylformamide. Excellent correlation between thermodynamic and spectroscopic measurements is observed.