Chapter 2, Problem 2D.20E

(a)

Interpretation Introduction

Interpretation:

The bond length of $\text{N}-\text{N}$ in hydrazine has to be estimated.

Concept Introduction:

The bond length is estimated to be average of covalent radii of two atoms within a bond. Each ion contributes to the bond length as illustrated as follows:

The expression to calculate the bond length is as follows:

  $\text{Bond length}=r_{\text{A}}+r_{\text{B}}$

Here,

$r_{\text{A}}$ denotes covalent radius of atom A.

$r_{\text{B}}$ denotes covalent radius of atom B.

(b)

Interpretation Introduction

Interpretation:

The bond length of $\text{N}=\text{N}$ in nitrogen hydride has to be estimated.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The bond length of nitrogen- nitrogen triple bond in ${\text{N}}_3{}^{-}$ has to be estimated. The reason for the specific trend of bond length has to be determined.

Concept Introduction:

Refer to part (a).