Question

Which of the following statements is true for azide ion ?

• A. It can act as bidentate ligand.
• B. Two N-N bond lengths are different in the anion.
• C. It is isoelectronic and isostructural with $C{O}_2$.
• D. There are two $\sigma$ and three $\pi$ bonds.

Answer 1

The correct option is C It is isoelectronic and isostructural with $C{O}_2$.

Azide is the anion with the formula $N_3.$

It is the conjugate base of hydrazoic acid $\left(H{N}_3\right).$

Azide is a linear anion that is isoelectronic with $C{O}_2,NC{O}^{-},N_{2}O,N{O}^{2+},NCF$.

According to valence bond theory, azide can be described by several resonance structures.