Sigma bond | Pi bond |
It is formed by the head on overlapping of orbitals (along the bonding axis). | It is formed by the sidewise overlapping of orbitals (above and below the bonding axis). |
It is denoted by the symbol σ. | It is denoted by the symbol π. |
It is a strong covalent bond as compared to pi bond. | It is a weak covalent bond. |
When 2 atoms interact, only 1 sigma bond formation is possible. | When 2 atoms interact, 1 or more pi bonds can be formed. |