Wiktionary
hexabenzocoronene
n. (context organic compound English) A polycyclic aromatic hydrocarbon in which six benzene rings are fused to the six available positions of a coronene ring
Wikipedia
Hexabenzocoronene
Hexabenzocoronene refers to 2 polycyclic aromatic hydrocarbons with the molecular formula CH and CH. They both consist of a central coronene molecule surrounded by 6 fused benzene rings.
The [bc,ef,hi,kl,no,qr] analogue (shown right) has been imaged by atomic force microscopy providing the first example of a molecule in which disparities in bond order and bond lengths of the individual bonds can be distinguished.