6.3 Fullerene

1.1 Physical Properties
1.2 Chemical Properties

3.1 Borax
3.2 Orthoboric acid ($H_3BO_3$)
3.3 Diborane ($B_2H_6$)
3.4 Boron Halides $(BX_3)$

5.1 Physical Properties
5.2 Chemical Properties

6.1 Diamond
6.2 Graphite
6.3 Fullerene

7.1 Carbon Monoxide $(CO)$
7.2 Carbon Dioxide $(CO_2)$

8.1 Compounds of Silicon

9.1 Important compounds of Nitrogen

10.1 Nitrogen Oxide $N_2O$ or Laughing gas (Neutral)
10.2 Nitric Oxide $NO$ (Neutral)
10.3 Nitrogen trioxide $N_2O_3$
10.4 Nitrogen dioxide or Di-nitrogen tetroxide $NO_2$ or $N_2O$
10.5 Nitrogen pentaoxide $N_2O_5$

11.1 Nitric acid $HNO_3$
11.2 Oxidation of Metalloid and Inorganic compounds by Nitric acid
11.3 Action of Metals & Proteins

13.1 Ozone

14.1 Oxides of Sulphur
14.2 Oxyacids of Sulphur

Newly discovered crystalline allotropes of carbon which are made by the heating of graphite in an electric arc in the presence of inert gases such as helium or argon.

There are many types of fullerenes such as $C_60$ and $C_70$.

$C_60$ is also known as Buckminster fullerenes which resembles in structure to a soccer ball. It contains twenty six- membered rings and twelve five membered rings. A six membered ring is fused with six or five membered rings but a five membered ring can only fuse with six membered rings.

All the carbon atoms are equal and they are $sp^2$ hybridised. Each carbon atom forms three sigma bonds with other three carbon atoms. The remaining electron at each carbon is delocalised in molecular orbitals, which in turn give aromatic character to molecule. This ball shaped molecule has $60$ vertices and each one is occupied by one carbon atom and it also contains both single and double bonds with $C–C$ distances of $143.5\ pm$ and $138.3\ pm$ respectively. (DIAGRAM)