Comprehensive model for the electronic structures of 1,2,4-cyclohexatriene and related compounds

Six-membered monocyclic systems containing second- (B-O) and third-row elements (Al-S) of the periodic table of elements are studied in detail, regarding the energetic order of the electronic states and the planarization energies, which together determine their chemical behavior. Also, how the various kinds of interaction influence the chemistry of this important class of intermediates is analyzed.