Abstract This paper briefly describes the meaning and formation conditions of delocalized π bond, summarizes and provides examples to illustrate the judgment methods for delocalized π bond in particles with known hybridization types of bonding atoms, proposes the “hybridization type discussion method” to solve the problem of determining delocalized π bond in particles with unknown hybridization types of bonding atoms in unfamiliar situations, and supplements the explanation of the judgment methods for delocalized π bond in particles that meet specific structural relationships.
