FT-IR Spectroscopic study of excess thermodynamic and transport properties of liquid mixtures of p-chloroacetophenone with alkoxyalkanols

Abstract

ABSTRACT Densities, speeds of sound and viscosities were measured for the binary mixtures para-chloroacetophenone (PCAP) with 2-alkoxyethanols (2-methoxyethanol [2-MOE], 2-ethoxyethanol [2-EOE] and 2-butoxyethanol [2-BOE]) at T = (303.15–318.15) K. These experimental data have been used to calculate excess volume (VE ), excess isentropic compressibility (KsE ), deviation in viscosity (∆η) and excess Gibbs free energy of activation of viscous flow (G*E ). The excess parameters have been fitted to the Redlich–Kister equation and the results were analysed in terms of acid–base interactions, hydrogen bond interactions and dipole–dipole interactions between unlike molecules. Further, the FTIR spectra have been recorded at 298.15 K and found to be useful for understanding the presence of hydrogen bonding between oxygen atom of carbonyl group of p-chloroacetophenone and hydrogen atom of the –OH group of 2-alkoxyethanols molecules in the present liquid mixtures. A good agreement is obtained between excess quantities and spectroscopic data.