Chapter 25, Problem 18P

Interpretation Introduction

Interpretation:

In the given naturally occurring substances, the isoprene units are to be identified.

Concept introduction:

The conjugated diene hydrocarbon with molecular formula ${\text{CH}}_{\text{2}}=\text{C}\left({\text{CH}}_{\text{3}}\right)-\text{CH}={\text{CH}}_{\text{2}}$ is called as isoprene or $\text{2-methyl-1,3-butadiene}$.

Isoprene units are the monomer of natural rubber and also the common building block for the construction of terpenoids.