Sigma (σ) Bond
1. σ – bond is formed by the axial overlap of the atomic orbitals.
2. The bond is quite strong.
3. Only one lobe of the p-orbitals is involved in the overlap.
4. Electron cloud of the molecular orbital is symmetrical around the inter-nuclear axis.
Pi (π) Bond
1. π – bond is formed by the sidewise overlap of atomic orbitals
2. It is comparatively a weaker bond.
3. Both lobes of the p-orbitals are involved in the overlap.
4. The electron cloud is not symmetrical.
