Hybridisation of Carbon in Diamond:- In diamond, each carbon atom undergoes sp3 hybridisation and linked to four other carbon atoms by using hybridised orbitals in tetrahedral fashion. The C-C bond length is 154 pm.
Hybridisation of Carbon in Graphite:- In grahite, each layer is composed of planar hexagonal rings of carbon atoms. Each carbon atom in hexagonal ring undergoes sp2 hybridisation and makes three sigma bonds with three neighbouring carbon atoms. Fourth electron forms a π-bond. C-C bond length is 14.15 pm.
