Study on molecular interactions of binary mixtures of 2,6 dimethyl cyclohexanone with substituted anilines at T = (303.15–313.15)K through thermodynamic properties and FT-IR spectra and correlation with the Jouyban–Acree model

•Density, speed of sound and viscosity values were determined for mixtures of 2,6-dimethylcyclohexanone.•Free volume contribution is the supporting factor for negative excess molar values.•The presence of H-bonding between unlike molecules was supported by FT-IR spectra.•Excess volumes were analyzed with Prigogine-Flory-Patterson (PFP) theory.•Application of Jouyban-Acree model shows a reasonably good agreement. The densities (ρ), speeds of sound (u) and viscosities (η) of binary mixtures of 2,6-dimethylcyclohexanone (2,6-DMCY) with substituted anilines (N,N-dimethylaniline (N,N-DMA), N-methylaniline (N-MA)) and aniline (A) measured over the entire composition range at temperatures (303.15, 308.15 and 313.15) K and 0.1 MPa. Using the experimental data, the excess volume, excess isentropic compressibility, and deviation in viscosity, excess partial properties of the components at infinite dilution were calculated. Prigogine-Flory-Patterson (PFP) theory is applied to identify the predominant molecular interaction. Jouyban-Acree model, results are discussed in terms of mean relative deviation (MRDs) and individual relative deviation (IRD) between calculated and experimental densities, speeds of sound and viscosities as an accuracy criterion. A good agreement is observed among the excess parameters and FT-IR spectroscopic properties.