Question

Ammonia forms hydrogen-bonding intermolecular forces resulting in an unusually high boiling point for a substance with the small size of${\mathbf{\text{NH}}}_{\mathbf{\text{3}}}$. Can hydrazine (${\mathbf{\text{N}}}_{\mathbf{\text{2}}}{\mathbf{\text{H}}}_{\mathbf{4}}$) also form hydrogen-bonding interactions?

Short answer

As hydrazine may create a hydrogen bond, this connection is strong enough to raise the boiling point of hydrazine.

Step-by-step solution

Concept Introduction

A hydrogen bond is an electrical attraction between a hydrogen atom covalently bonded to a more electronegative atom or group and another electronegative atom with a single pair of electrons.

Can hydrazine form hydrogen-bonding interactions

On the molecule of hydrazine (${\text{N}}_{\text{2}}{\text{H}}_{\text{4}}$), it is composed of two atoms of nitrogen and four atoms of hydrogen. Here, thehydrogen and nitrogen are bonded together. And the two nitrogen atoms are also bonded with each other.

Here, the bond of two nitrogen atoms cannot form a hydrogen bond since it is nonpolar. But on the side of the bondsbetween nitrogen and hydrogen, there will be a significant electronegativity difference that will make them polar. Sincethe atoms has a small amount of electronegativity difference, therefore, it will enable the hydrogen bond.

Therefore, since hydrazine can form a hydrogen bond, this bond will be strong enough to make hydrazine's boiling point high.