question_answer

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.

Correct Answer: C

Solution :

[a]   Four membered ring is not stable.

[b] Both \[N-N\]bond lengths are identical and that is \[1.15\overset{{}^\circ }{\mathop{A}}\,\]

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

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

So both are also isostructural

[d] There are two u and two \[\pi \] bonds.