Thermodynamic studies of some 1,2,4-triazole derivatives in DMF and THF solutions at 308.15 K

摘要

Some new 1,2,4-triazole derivatives have been synthesized and characterized by TLC, IR, NMR and mass spectra. Densities, viscosities and Ultrasonic velocities of these compounds have been measured over the wide composition range at 308.15 K in dimethyl formamide (DMF) and tetrahydro furan (THF). From these data, various acoustical and thermodynamic parameters (C.V. Suryanarayana, J. Kuppuswamy. J. Acoust. Soc. Ind., 4, 75 (1976); H. Erying, M.S. John, Significance of Liquid Structures, Wiley, New York (1969) G.K. Johri, R.C. Misra. Acustica, 56, 66 (1989)) were evaluated. Some of these Parameters are isentropic compressibility (K-S), intermolecular free length (L-f), relaxation strength (r), relative association (R-A), Rao's molar constant (R-m), van der Waal's constant (b), molar compressibility (W), internal pressure (pi), free volume (V-f), solvation number (S-n) etc. The behavior of solutions of these compounds in DMF and THF are explained from the evaluated parameters.