Chapter 22, Problem 75A

Interpretation Introduction

(a)

Interpretation:

The type of organic compound which is nepetalactone needs to be determined.

Concept introduction:

The type of an organic compound depends on the arrangement of different elements present in it. It depends on the different functional groups in the molecules.

Explanation of Solution

Nepetalactone is known to be bicyclic monoterpenoid organic compound. There are 10 carbon atoms which are derived from isoprene having 2 fused rings. Out of the 2 rings, 1 is cyclopentane and other is lactone. The compound belongs to the class of iridoids.

Interpretation Introduction

(b)

Interpretation:

The structural formula for nepetalactone needs to be drawn with missing hydrogen atoms.

Concept introduction:

A structural formula tells about the actual number of atoms present in the molecule as well as their arrangement in the molecule.

Explanation of Solution

The given structure of nepetalactone is as follows:

Here, H atoms are missing in the structure thus the complete structure with H atoms is represented as follows:

Interpretation Introduction

(c)

Interpretation:

The molecular formula of the given nepetalactone needs to be determined.

Concept introduction:

The molecular formula tells about the actual number of atoms of different elements present in the molecule.

Explanation of Solution

The given structure of nepetalactone is as follows:

Here, H atoms are missing in the structure thus the complete structure with H atoms is represented as follows:

From the above structure, there are 10 carbon atoms, 14 hydrogen atoms and 2 oxygen atoms. Thus, the molecular formula is ${\text{C}}_{\text{10}}{\text{H}}_{\text{14}}{\text{O}}_{\text{2}}$.