STUDIES ON INTERMOLECULAR INTERACTIONS IN LIQUID FORMAMIDE-1-PROPANOL, N,N-DIMETHYLFORMAMIDE-1-PROPANOL AND N,N-DIMETHYLFORMAMIDE--ETHANOL BINARY-MIXTURES

The H-1-NMR spectra of liquid binary mixtures, formamide (F)-1-propanol (PrOH), N,N-dimethylformamide (DMF)-1-propanol and N,N-dimethylformamide-ethanol (EtOH) were recorded at 298 K within nearly the whole range of the mixed solvent compositions. From these data were found the values of the spectral parameters, DELTAdelta(F-PrOH), DELTAdelta(DMF-PrOH) and DELTAdelta(DMF-EtOH). The densities (d12) and viscosities (eta12) of the mixed solvents were measured at 298.15 K, as well as the dielectric permittivities (epsilon12) at 288.15 K, 298.15 K and 303.15 K. From all these new patent data, the values of molar volumes (V12), kinematic viscosities (eta12/d12) and their deviations from ''ideality''were calculated. Additionally, the values of the temperature coefficients of dielectric permittivity, a,2, were found. These structural parameters as functions of concentration suggest the formation of the most stable ''complexes'' (sub-units) of the 3F.2PrOH and 2F.PrOH types in the F.PrOH mixtures, DMF.EtOH type in the DMF-EtOH mixtures and DMF.PrOH type in the DMF-PrOH mixtures.