Acenes

The acenes or polyacenes are a class of organic compounds and polycyclic aromatic hydrocarbons made up of linearly fused benzene rings.

Due to their increased conjugation length the larger acenes are also studied.Theoretically, a number of reports are available on longer chains using density functional methods. They are also building blocks for nanotubes  and graphene. Unsubstituted octacene (n=8) and nonacene (n=9.


Reference -https://en.m.wikipedia.org/wiki/Acene