1. Conjugation in Macrocyclic Systems, Part 30.?Part 29: Chem. Ber., in press.
2. Benzoide versus annulenoide Aromatizität: Synthese und Eigenschaften des Kekulens
3. Benzenoidversus Annulenoid Aromaticity: Synthesis and Properties of Kekulene
4. ? (ISNA-Proc., Scndai/Japan, August 1970) claimed, without giving any details, to have prepared kekulene (1)?which they named ?[12]coronaphene??as long ago as 1970. Since other authors (cf., for example, [3]) refer to this claim we are compelled to make the following statement: The authors named have until now published neither a synthesis of (1) nor any account of its properties in the chemical literature. Although they have not repeated their claim to the synthesis of (1) in later topically related publications, they have failed so far to withdraw this claim.
5. On the Number of Aromatic Sextets in a Benzenoid Hydrocarbon