STUDY OF THE INTERMOLECULAR INTERACTIONS IN LIQUID N,N-DIMETHYLACETAMIDE WATER MIXTURES

The H-1-NMR spectra of the liquid binary mixtures, N,N-dimethylacetami de (DMA)-water, were recorded at 298 K within nearly the whole range o f the mixed solvent compositions. From these data the values of the sp ectral parameter, Delta delta(DMA-H2O) were found. The viscosities and surface tensions of the mixed solvents were measured at 298.15 K, as well as the dielectric permittivities at 288.15 K, 298.15 K and 303.15 K. From all these new parent data, the values of molar volumes and th eir deviations from ''ideality'' were calculated. Additionally, the va lues of the temperature coefficients of dielectric permittivity were f ound. These structural parameters as functions of concentration sugges t the formation of the most stable ''complex'' (sub-unit) of the DMA . 2H(2)O type.