Dielectric properties and hydrogen bonding interaction behaviour in binary mixtures of glycerol with amides and amines

The concentration dependent static dielectric constant, high frequency limit dielectric constant, excess dielectric constant and the effective Kirkwood correlation factor of the binary mixtures of glycerol with formamide, N,N-dimethylformamide, N,N-dimethylacetamide, ethanolamine and N,N-dimethylaminoethanol have been determined at 30 °C. The values of these functions emphasize mainly on the hydrogen bonding interactions between the unlike molecules in glycerol-amides and glycerol-amines mixtures, in which their interaction strength and type of dipolar ordering depends on the extent of substitution of the amides/amines. The pronounced deviation in excess dielectric constant values around 0.5 mole fraction concentration of the mixture constituents confirm the formation of a stable adduct of stoichiometric ratio 1:1 in the glycerol mixed amides/amines systems.