Abstract

The theoretical treatment of the electronic spectrum of benzenoid hydrocarbons recently given by Dewar and Longuet-Higgins (Part I) is generalized so that full account is taken of electron interaction. The method is based on the use of a self-consistent molecular orbital function for the ground state and corresponding functions for excited states. It is found that all the general features of the method of Part I carry over, although certain accidental degeneracies are removed. Approximate numerical calculations based on the new method give support to the assignments made by Dewar and Longuet-Higgins.

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