CALCULATION OF OPTICAL AND DIELECTRIC ANISOTROPY OF NEMATIC LIQUID-CRYSTALS

The optical birefringence (Delta n) and dielectric anisotropy las) of nematic liquid crystals were calculated using the well-known theories of Vuks and Maier-Meier, respectively. The molecular dipole moments an d polarizabilities needed for the estimation were taken from semiempir ical AM1 calculations. The calculated values are in good agreement wig the experimental results for the investigated compounds having differ ent core structures and polar substituents.