Methano-bridged 14-.pi.-electron aromatic annulenes. 3. Carbon-13 nuclear magnetic resonance spectroscopic study of the 1,6-methanofluorenyl anion and comparison with the related 1,6-methanoindenyl and fluorenyl anions
Methano-bridged 14-.pi.-electron aromatic annulenes. 3. Carbon-13 nuclear magnetic resonance spectroscopic study of the 1,6-methanofluorenyl anion and comparison with the related 1,6-methanoindenyl and fluorenyl anions