Chapter 10, Problem 10A.4AE

(i)

Interpretation Introduction

Interpretation:

The symmetry elements of ${\text{NO}}_{\text{2}}$ has to be stated.  The point group of ${\text{NO}}_{\text{2}}$ has to be stated.

Concept introduction:

A symmetry operation is defined as an action on an object to reproduce an arrangement that is identical to its original spatial arrangement.  The group of symmetry operations of which at least one point is kept fixed is called point group.  The symmetry operations can be identity, rotation, reflection, inversion and improper rotation.

(ii)

Interpretation Introduction

Interpretation:

The symmetry elements of ${\text{PF}}_5$ has to be stated.  The point group of ${\text{PF}}_5$ has to be stated.

Concept introduction:

As mentioned in the concept introduction in part (a).

(iii)

Interpretation Introduction

Interpretation:

The symmetry elements of ${\text{CHCl}}_{\text{3}}$ has to be stated.  The point group of ${\text{CHCl}}_{\text{3}}$ has to be stated.

Concept introduction:

As mentioned in the concept introduction in part (a).

(iv)

Interpretation Introduction

Interpretation:

The symmetry elements of $\text{1,4-difluorobenzene}$ has to be stated.  The point group of $\text{1,4-difluorobenzene}$ has to be stated.

Concept introduction:

As mentioned in the concept introduction in part (a).