SIMPLE-MODEL FOR THE DIELECTRIC BEHAVIOR OF POLAR-SOLVENTS IN THE MEAN SPHERICAL APPROXIMATION

A simple model based on the mean spherical approximation is described for the dielectric properties of polar solvents. The molecular properties required are the dipole moment, the molecular polarizability, and the molecular diameter. It is shown that inclusion of a stickiness parameter accounting for other electrostatic features and nonsphericity in the real system leads to a simple analytical result from which the dielectric constant may be calculated. The stickiness parameter is shown to be correlated to the magnitude of dipole-dipole interactions in the system. It either aligns or misaligns the electrical dipoles of the solvent and therefore can be called a structure-forming or structure-breaking parameter.