Abstract

The topological analysis of the sigma-pi separation of the electron localization function (ELF) to evaluate the aromaticity of planar compounds using the bifurcation values was described. The topology of the ELF ? and ELF? functions were used to quantify the resonance concept. The aromaticity of aromatic compounds such as B 6CO6, Al42- and N5 were described by the highest bifurcation values. The stability from the two ? aromatic electrons and the ? system in the plane of the molecules was obtained in the all-metal aromatic compounds.