Chapter 2, Problem 62P

Interpretation Introduction

Interpretation: Primary, secondary and tertiary hydrogen in structure of $\text{2-methylbutane}$ should be labeled.

Concept introduction: The carbon linked to one alkyl / carbon while other two $\text{H}$ are termed primary carbon. Thus hydrogen linked to such carbon is referred as primary.

The carbon linked to two alkyl /carbons and one $\text{H}$ is termed secondary carbon. Thus hydrogen linked to such carbon is referred as secondary. The carbon linked to three alkyl groups/carbons and no $\text{H}$ is termed tertiary carbon. Thus hydrogen linked to such carbon is referred as tertiary.

The different kinds of primary, secondary and tertiary hydrogen are illustrated as follows: