Some New Allotropes Fullerenes:5-and 6-membered rings arranged to form a“soccer ball'” structure. Nanotubes:half of a C6o sphere fused to a cylinder of fused aromatic rings. buckyball(C60) carbon nanotube Copyright2005 Pearson Prentice Hall,Inc.Some New Allotropes ❖Fullerenes: 5- and 6-membered rings arranged to form a “soccer ball” structure. ❖Nanotubes: half of a C60 sphere fused to a cylinder of fused aromatic rings