Study the adiabatic compressibility and acoustic impedance of chlorosubstituted pyrazoles in various solvent water mixtures

The measurement of ultra-sonic velocities and densities of 3 (2 Hydroxy – 3, 5 – dichlorophenyl) – 4 – anisoyl – 5 (4 – methoxy phenyl) -1 – phenyl pyrazoles (L1) and 3 – (4 Chloropheny1) – 4 – (2 – chlorophenyl benzoyl) – 5 – (2 – hydroxy phenyl) – pyrazoles (L2) by ultra-sonic interferometricaly and the results obtained used to determine the acoustical properties like adiabatic compressibility, apparent molal volume, inter molecular free length, relative association and acoustic impedance. The measurement of ultra-sonic velocity and density of ligands (L1& L2) are carried out in the 70% (v/v) dioxane+water and 70% (v/v) ethanol+water mixtures at 35 °C, 45 °C and 55 °C. The acoustical properties were used to discuss the interaction between the ligands and solvent.