Theory of diamagnetic anisotropy for conjugated monocyclic systems

Deficiencies are pointed out in the theory based on the one-electron approximation. The anisotropy is calculated for a cyclic polyene with 4n electrons in the one-configuration and multiconfiguration approximations for complete axial symmetry and for perturbed axial symmetry. The relation of the paramagnetic term to the perturbation is derived for both approximations.