Study of Molecular Interactions in Binary Mixtures at Various Temperatures Containing 2,6-Dimethylcyclo­hexanone and Aliphatic Primary Alcohols: Thermodynamics and FT-IR Spectroscopic Studies

This paper presents experimental density (ρ), viscosity (η), and speed of sound (u) measurements for three binary mixtures of 2,6-dimethylcyclo­hexanone (2,6-DMC) with aliphatic primary alcohols, i.e., 2-propyn-1-ol, 2-propen-1-ol, propan-1-ol, over the entire composition range from 303.15 to 313.15 K and at 0.1 MPa. The excess parameters (V E , k s E ), deviation in viscosity (Δη), excess partial molar volumes (V̅ m,1 °E and V̅ m,2 °E), and excess partial molar isentropic compressibilities (K̅ s, m,1 °E and K̅ s, m,2 °E) of the components at infinite dilution were calculated from the experimental thermophysical properties. The variation of these properties suggests the hydrogen bond, dipole–dipole interactions, and charge-transfer complex formation between 2,6-DMC and primary alcohols. Furthermore, the V E results have been analyzed in terms of Prigogine-Flory-Patterson (PFP) theory. Moreover, the FT-IR results reveal the hydrogen bonding interactions (−C=O---H-O−) between 2,6-dimethylcyclo­hexanone and self-associated primary alcohols.