ANNULENES BENZO HETERO HOMODE

Contents: 1. Introduction; 2. Aromaticity of Mono- and Polycyclic Systems (History of the Aromatic Sextet from Kekulé to Hückel; Kekulé Structure Count; Aromaticity Criteria; Resonance Energy of Aromatics; Aromaticity of Polycyclic Bridged Systems; Condensed Benzenoid Polycyclic Hydrocarbons); 3. Graph Theory as a Key Tool for the Definition and Enumeration of Valence Isomers (Graph-Theoretical Preliminaries; Interplay Between Graph Theory and Chemistry; Chemistry as a Breeding Ground for Graph Theory; Definition of Valence Isomers; Finding all Possible Valence Isomers of Annulenes (CH)n and of Homoannulenes; Pólya's Theorem and Valence Isomers of Heteroannulenes; Finding Benzoderivatives of Valence Isomers of [n]Annulenes; Finding all Possible Isomers of Benzenoid Polycyclic Condensed); 4. Annulenes (Introduction; Cyclobutadiene CBD; [6]Annulene or Benzene; [8]Annulene or Cyclooctatetraene COT; [10]Annulene or Cyclodecapentaene; Larger [n]AnnuIenes (n >= 12); General Conclusions for Annulenes; Dehydroannulenes; Systems Related to Annulenes; Annuleno-Annulenes; Annulenes with Zero-Atom Bridges); 5. Bridged Annulenes (Introduction; Carbon-Bridged [10]Annulenes; Carbon-Bridged [12]Annulenes; Carbon-Bridged [14]Annulenes; Carbon-Bridged [16]Annulenes; Carbon-Bridged [18]- and [22]Annulenes; Heteroatom-Containing Bridged Annulenes; Bridged Annulene Ions); References; Addenda; Index