Ultrasonic Study of Binary Mixture of Dimethylformamide in Methanol at Different Temperatures

Abstract

The present work investigates the ultrasonic velocity, density, adiabatic compressibility, intermolecular free length, and acoustic impedance of binary mixtures of N, N-dimethylformamide (DMF) and methanol at 303 K and 308 K. Measurements were carried out over the entire composition range using a fixed frequency of 2 MHz. From the experimentally determined ultrasonic velocity and density values, various acoustical parameters were computed to study molecular interactions. The observed variations in these parameters with concentration and temperature provide insight into hydrogen bonding, dipole–dipole interactions, and structural rearrangements in the mixtures