question_answer

Which of the following statements is true for azide ion?

A) It can acts 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.

Correct Answer: C

Solution :

[a]  Four membered ring is not stable.

[b] Both N-N bond lengths are identical and that is 1.15

[c] \[N_{3}^{-}\] and both\[C{{O}_{2}}\] have same number of electrons i.e. 22; so isoelectronic.

\[{{N}^{-}}=\underset{sp}{\mathop{\overset{+}{\mathop{N}}\,}}\,={{N}^{-}}\](linear) \[O=\underset{sp}{\mathop{C}}\,=O\](linear)

So, both are also isostructural

[d] There are two and two bonds.