Ultrasonic studies of substituted isoxazoles and pyrazolines in dioxane and dioxane-water mixtures at different temperatures

1203-1205Ultrasonic velocities and densities of 3-(2-hydroxy-3-bromo-5-methylphenyl)-5-phenyl isoxazole (L1), l-phenyl-3-(2-hydroxy-3-bromo-5-methylphenyl)-5-(4-methoxyphenyl) pyrazoline (L2), in dioxane and different percentages of dioxane-water mixtures at different temperatures (303, 308, 313, 318, 323 K ± 0.1 K) have been evaluated at 0.01 M concentration. Different acoustic properties like partial molal volume (ϕv), adiabatic compressibility (βs), apparent molal compressibility (ϕk(s)) intermolecular free length (Lf), relative association (RA) and specific acoustic impedance (Z) have been determined by using single crystal interferometer at 1MHz frequency. The obtained results have been interpreted in terms of solute solvent interactions