Ketene imminium ion (4), diphenyl ketene, tosyl isocyanate and tetracyanoethylene add selectively to the semicyclic double bond of 1. This is interpreted to result from the polarity of the semicyclic double bond in 1.
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
作者:Douglas N. Butler、Indranil Gupta、Winnie Wong Ng、Stanley C. Nyburg
DOI:10.1039/c39800000596
日期:——
Spectroscopic and chemical evidence reveals the intramolecular π–π orbital proximity in the novel Diels–Alder adducts (7) and (9); the X-raycrystalstructure of (9) is reported.