# 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