Physicochemical behaviour of 2-Pentanone + amine mixtures at three temperatures

Abstract

Thermophysical properties viz. Isothermal compressibility (βT), internal pressure (Pi) along with their excess counterparts coupled with energy (ΔEvap) and enthalpy of vapourization (ΔHvap), cohesive energy density (CED), solubility parameter (δ), free volume (Vf) have been studied to understand the nature and extent of interactions between 2-pentanone and three amines (Pyridine, N-methylaniline, Aniline) over the range of temperatures. The investigation focuses on understanding the interactions present between amine and a carboxylic functional group. This helps to get a deeper insight into the functionality of the amide group which plays a crucial role in biologically complex systems. The study shows that the strength of interactions follows an order: Pyridine < N-methylaniline < Aniline with 2-Pentanone for all temperatures arising due to the capability of components to form H-bonding.