Chapter 2, Problem 23P

Interpretation Introduction

Interpretation:

The structural possibility for the hydrocarbon which does not fit the formula ${\text{C}}_5{\text{H}}_8$ is to be determined.

Concept Introduction:

The general molecular formula of an alkane is ${\text{C}}_{\text{n}}{\text{H}}_{2\text{n}+2}$.

In cycloalkanes, the number of hydrogen atoms is two less as compared to the corresponding alkanes possessing the equal number of carbon atoms. The general molecular formula of cycloalkanes is ${\text{C}}_{\text{n}}{\text{H}}_{2\text{n}}$.

Hydrocarbons having one double bond and one ring or two double bonds with no rings will have four hydrogen atoms less as compared to the alkanes that have the same number of carbon atoms. Their general molecular formula will be ${\text{C}}_{\text{n}}{\text{H}}_{2\text{n}-2}$.