The synthesis of dicyclopententobenzocyclobutene from 1, 1-dicyclopentenyl and dimethyl cyclobutene-1, 2-dicarboxylate is described. Current theories regarding sterically induced aromatic bond alternation would predict that both the σ and π frameworks should show more double bond character exocyclic to the small fused rings. The structural parameters of dicyclopentenobenzocyclobutene have been determined by single crystal X-ray analysis. ...
![1,2,2a,2b,3,4,5,6,7,8,8a,8b-dodecahydrocyclobuta[e]-as-indacene-2a,8b-dicarboxylic acid结构式](https://image.chemsrc.com/caspic/349/66616-86-2.png)
