helicenes

https://doi.org/10.1351/goldbook.H02762
ortho-Fused polycyclic @A00441@ or heteroaromatic compounds in which all rings (minimum five) are angularly arranged so as to give helically shaped molecules, which are thus @C01057@, e.g. hexahelicene.
H02762.png
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1339 [Terms] [Paper]