Question

What type of multiple bonds are present in N₂ molecule?

Answer 1

1. The N₂ molecule contains a triple bond between the two nitrogen atoms.
2. This triple bond consists of one sigma (σ) bond and two pi (π) bonds.
3. The bond is formed by the overlap of p orbitals from each nitrogen atom, called pπ-pπ multiple bonding.
4. This triple bond is very strong, giving N₂ a high bond dissociation enthalpy (~945 kJ/mol).
5. Due to this strong triple bond, nitrogen is very stable and less reactive.
6. Nitrogen cannot expand its octet as it lacks d-orbitals, so the maximum bonds formed are four, but in N₂ it forms a triple bond.
7. The pπ-pπ multiple bonds are characteristic of nitrogen due to its small size and high electronegativity.

Thus, N₂ has one sigma and two pi bonds, making a triple bond formed by pπ-pπ overlap.