# Do molecules containing only carbon exist?

Why doesnt carbon forms bonds with itself to form a molecule. Carbon shows the property of catenation then why doesnt it form a cyclic molecule as :

 C = C
‖   ‖
C = C

• graphene, diamond, fullerenes ... – gilleain Nov 15 '18 at 9:23
• also relevant : chemistry.stackexchange.com/questions/43887/… – gilleain Nov 15 '18 at 11:58
• buckyball also... – MaxW Nov 15 '18 at 20:55
• Diamond and graphene if not engineered down do not qualify as molecules. Buckyballs is a nik for Buckminsterfullerenes. See Oscar Lanzi below for an answer – Alchimista Nov 17 '18 at 17:43

## 1 Answer

They do form. Besides fullerenes, there are carbon molecules with varying numbers of atoms around some stars. Such molecular forms are, of course, less stable than the macromolecular structures we more commonly see under ambient conditions.