Abstract
Densities and ultrasonic velocities were measured for binary liquid mixtures of ethyl acetoacetate (EAA) with chloroform (CHCl3) and dimethylsulphoxide (DMSO) over the entire composition range. These experimental values were used to calculate the adiabatic compressibility (βs), intermolecular free length (Lf), excess molar volume (VE), excess adiabatic compressibility (βsE) and excess intermolecular free length (LfE) for the liquid mixtures under consideration. In all the excess parameters, a positive deviation was observed in CHCl3–EAA binary mixture, whereas a slight negative deviation was found for EAA–DMSO binary liquid mixture. These deviations were explained in terms of molecular interactions between like and unlike molecules and further affirmed by UV–Vis spectroscopic measurements in terms of polar and non-polar environment in the close proximity of solvatochromic dye. Fourier transform infrared spectroscopy (FT-IR) and proton-nuclear magnetic resonance (H1 NMR) measurements have also been done to explain the molecular interaction in the binary liquid mixtures.
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