STUDY ON THE INTERNAL STRUCTURES OF LIQUID N,N-DIMETHYLFORMAMIDE-BENZYL ALCOHOL MIXTURES

The H-1-NMR spectra of liquid binary mixtures, N, N-dimethylformamide (DMF)-benzyl alcohol (PhCH(2) OH), were recorded at 298 K within whole range of the mixed solvent compositions. From these data were found t he values of the spectral parameter, Delta delta(DMF-PhCH(2)OH). The d ensities (d(12)) and viscosities (eta(12)) of the mixed solvents were measured at 298.15 K, as well as the dielectric permittivities (epsilo n(12)) at 293.15 K, 298.15 K, 303.15 K, 308.15 K, 313.15 K and 318.15 K. From all these new parent data, the values of molar volumes (V-12), kinematic viscosities (eta(12)/d(12)) and their deviations from ''ide ality'' were calculated. Additionally, the values of the temperature c oefficients of dielectric permittivity (alpha(12)), were found. The mo lar limiting conductances (Lambda(0)) of NaCl were measured at 298.15 K within whole range of mixed solvent compositions. From these data we re found the values of the association constants (K-A) and the Walden products (Lambda(0) .eta). The scrutiny of all these structural parame ters as functions of the mixture composition points at a formation of the ''complexes'' (sub-units) of the DMF . PhCH(2)OH and DMF . 2 PhCH( 2)OH types in the bulk of the mixed solvents.