On the Diamagnetism of Perylene. II

Applying London s theory of diamagnetic anisotropy, computations have been performed on the structure of perylene molecule. In this problem, the theory gives no definite value if we choose such a model constructed with the same, five regular hexagons as we usually do in the conventional method. Introducing a simple parameter, this difficulty is removed with the result that the relative diamagnetic anisotropy of this molecule is about twice as large as that of naphthalene, showing a good agreement with experiment. A model as a peripheral form gives a divergent result from experiment.