Chapter 8, Problem 46P

Interpretation Introduction

Interpretation:

The index of hydrogen, rings, and double bonds in myrcene, structure of compound B, and structure of myrcene are to be determined.

Concept introduction:

The change in number of pairs for atoms of hydrogen of given compound and the acyclic compound, which have the same number of carbon as in the given compound, is known as Index of hydrogen deficiency.

The Index of hydrogen deficiency is calculated by using the following formula:

$\begin{array}{c}\text{IHD}=\text{rings}+\pi \text{bonds}\\ =C-\frac{H}{2}-\frac{X}{2}+\frac{N}{2}+1\end{array}$

Here, $C$ represents the number of carbon atoms, $N$ represents the number of nitrogen atoms, and $X$ represents the number of halogen atoms.