Aza-Analogues of Benzenoid Hydrocarbons

The long-wavelength absorption bands exhibited by solutions of methiodides of aza analogues of benzenoid hydrocarbons have been attributed to the presence of charge-transfer complexes.01 There is a correlation between the excitation energies of the bands and the calculated electron affinity of the cations, in agreement with the delocalized rather than the localized model of the excited state in the charge-transfer complex.91... 

Taking into account all aza-analogues of benzenoid hydrocarbons recently studied. it is apparent that in most cases replacement of the carbon atom by the nitrogen atom increases aromaticity, as compared with the parent hydrocarbon. Moreover, low-aromatic... 

Chart 2. Local Values of HOMA, EN, and GEO Terras for Aza-Analogues of Benzenoid Hydrocarbons ... 

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