Partitioning of π-electrons in rings of aza-derivatives of naphthalene

Abstract

A recently proposed method for calculating the π-electron contents (EC)of rings of heteroatom-containing polycyclic conjugated molecules was applied tothe aza-derivatives of naphthalene. The ma in finding was that a nitrogen atom inposition α (resp. β) diminishes (resp. increases) the EC-value of the respective ring.Such a regularity in the displacement of π-electrons can be (qualitatively) rationali-zed by means of resonance-theoretical reasoning.