Acoustic, volumetric and FTIR study of binary liquid mixtures of 2-methyl cyclohexanone with amides

Highlights: • Density, Speed of sound and Viscosity have been measured of amides and 2-methyl cyclohexanone between 303.15 and 313.15 K. • The effect of temperature has been discussed on excess derived properties in terms of intermolecular interactions. • PFP theory confirmed the molecular interactions due to free volume. • The influence of intra molecular hydrogen bond was analyzed by thermophysical properties and FT-IR spectra. Densities, speeds of sound, and viscosities at various temperatures were determined for the systems: 2-methylcyclohexanone (2-MCYH) + formamide (F), N-methylformamide (NMF) and N, N-dimethylformamide (DMF). From the experimental results, Excess molar volume $V_{\text{m}}^{\text{E}}$, Excess isentropic compressibility ${\kappa }_{\text{s}}^{\text{E}}$, deviation in viscosity Δη and excess Gibbs energy of activation of viscous flow G^*E, Excess partial molar properties at infinite dilution ${\overline{V}}_{\text{m},1}^{°\text{E}}$, ${\overline{V}}_{\text{m},2}^{°\text{E}}$, ${\overline{K}}_{\text{s},\text{m},1}^{°\text{E}}$ and ${\overline{K}}_{\text{s},\text{m},2}^{°\text{E}}$ were calculated. There is evidence of complex formation between unlike molecules. FT-IR properties have been carried out to study the specific interaction, such as the formation of the hydrogen bond between unlike molecules in the binary liquid mixtures, a good agreement is observed among the excess parameters and FT-IR spectroscopic properties.