The electrical properties of some bicyclic nitriles

Polar organic materials, which have high dielectric constants in the liquid state, usually have low dielectric constants when solid. The reason for this behavior is that as the material solidifies, the dipoles become frozen in, and the molecules can no longer orient themselves in the electrical field. There are however a number of organic materials which do not follow this general pattern of dielectric behavior. These materials, called rigid rotators, retain their freedom of rotation in the solid state and therefore have high dielectric constants well below their melting points.