On the Interaction Energy Between Some Nematogenic Molecules

Calculation of the interaction energies between nematogenic MBBA and PAA molecules have been performed in the framework of the Rayleigh-Schrödinger perturbation theory, supplemented with the empirical repulsive term. The predominant role of dispersion interaction as well as negligibly small induction energy have been found. The electrostatic contribution to the interaction energy has been discussed. Some remarks relating to the possible mode of molecular motion have also been made.