A comparative study of thermophysical and spectroscopic properties in mixtures of isomeric butanediol and N,N-dimethylformamide

The thermodynamic parameters viz. excess molar volume VE and ultrasonic speed u, transport parameter viscosity η, 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 QiE, isentropic compressibility KSE, deviation in ultrasonic velocity uD, viscosity deviation Δη, deviation in Gibbs energies of activation for viscous flow g(x), and excess NMR chemical shift δE 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.