An unusual bilaterally flanked olefin; X-ray crystal structure of 5,14;7,12-bis-(o-benzeno)-6,13-ethenylidene-5,5a,6,6a,7,12,12a,13,13a,14-decahydropentacene
Abstract
Spectroscopic and chemical evidence reveals the intramolecular π–π orbital proximity in the novel Diels–Alder adducts (7) and (9); the X-ray crystal structure of (9) is reported.