RESONANCE IN LARGE BENZENOID HYDROCARBONS

Pi-sextet resonance between Kekule valence structures of benzenoid hyd rocarbons are depicted by benzenoid resonance graphs. We outline the c onstruction of the resonance graphs for families of benzenoid compound s. For the compounds considered the resonance graphs are built from fu sed n-dimensional cubes. We report the leading eigenvalue of the reson ance graphs (lambda) and two different bounds to the leading eigenvalu e. Correlation between lambda and RE is examined.