Some physicochemical properties of acetonitryle-methanol binary liquid mixtures

Density and refractive indices for mixtures of acetonitryle with methanol were measured over the whole composition range at 298.15 K, as well as the relative permittivities at 288.15 K, 298.15 K and 308.15 K. From these data the excess molar volumes, apparent and partial molar volumes of acetonitryle and methanol, the excess relative permittivity, the temperature coefficients of relative permittivity and Kirkwood's correlation factor for investigated mixtures were calculated. The H-1-NMR spectra of these liquid binary mixtures, were recorded at 298 K and the spectral parameters, Delta delta (ACN-MeOH) were calculated. These structural parameters as functions of concentration suggest the formation of the structures such as clathrate and the most stable complexes of the 2 ACN . MeOH and ACN . 3MeOH types.