Durch Verklammerung gespannte Perylene — Das Coronen‐Isomer Dicyclopenta[1,2,3‐cd:1′,2′,3′‐Im]perylen und Dimethanoperylen

Strained Perylenes By Clamping — The Coronene Isomer Dicyclopenta[1,2,3,‐ cd : 1′,2′,3′‐ Im ]perylene and Dimethanoperylene Perylene ( 3 ) is clamped by C 2 and C 1 bridges with formation of the heptacyclic title compound dicyclopenta[1,2,3‐ cd : 1′,2′,3′‐ Im ]perylene ( 10 ) (characterized) and 1 H ,6 H ‐dicyclobuta[1,2,3‐ cd : 1′,2′,3′‐ Im ]perylene ( 4 ) (detected by mass spectrometry and 1 H‐NMR absorptions). The influence of strain on UV and fluorescence spectra and on cyclic voltammetry is discussed