Molecular interaction studies on thermophysical and excess properties of formamide with n-propanol

Abstract

Abstract Static dielectric constants at (293.15, 298.15, 303.15 K), densities and refractive indices at (293.15 K) of binary mixtures of formamide with n-propanol have been measured over the entire range of mole fractions. The variation in measured parameters with respect to temperature and composition are discussed in detail. Excess dielectric constants, Kirkwood and Bruggeman factors were estimated from experimental dielectric data to confirm molecular structure, orientation of electric dipoles, intermolecular interaction and hydrogen bonding in the binary mixtures. Excess molar volume VE, deviation in molar refraction ΔR, related thermophysical parameters, excess properties have also been estimated and analyzed. The nonlinear variation in dielectric constants, deviation in linear relation in Bruggeman factor, negative VE and ΔR suggest the presence of molecular interaction and formation of hydrogen bonds between formamide and n-propanol molecules.