STUDY ON THE INTERNAL STRUCTURES OF LIQUID FORMAMIDE PROPANE-1,2-DIOLMIXTURES

The H-1-NMR spectra of liquid binary mixtures, formamide (F)-propane-1 ,2-diol (PD-1,2), were recorded at 298 K within nearly whole range of the mixed solvent compositions. From these data were found the values of the spectral parameter, Delta delta(F-PD-12). The densities (d(12)) and viscosities (eta(12)) of the mixed solvents were measured at 298. 15 K, as well as the dielectric permittivities (epsilon(12)) at 288.15 K, 298.15 K and 303.15 K. From all these new parent data, the values of molar volumes (V-12), kinematic viscosities (eta(12)/d(12)) and the ir deviations from ''ideality'' were calculated. Additionally, the val ues of the temperature coefficients of dielectric permittivity, alpha( 12), were found. These structural parameters as functions of concentra tion suggest the formation the most stable ''complex'' (sub-unit) of t he 3 F.2 PD-1,2 type.