SEARCH Articles Figures Tables Arai, S., Hida, M„ Polycyclic Aromatic Nitrogen Cations Aromatic nitrogen cations, polycyclic Aromaticity, cycloheptatrienyl cation polycyclic aromatic compounds Cyclizations cationic polycyclization Polycyclic aromatic hydrocarbons cation Polycyclic aromatic hydrocarbons radical cation mechanism Polycyclic aromatic nitrogen cations review)