Chapter 18.1, Problem 18.1P

Interpretation Introduction

Interpretation:

The amine and the hydroxyl group in the lupinine is to be labeled as 1°(primary) , 2° (secondary) or 3°(tertiary).

Concept Introduction:

• Amines are organic compound which are derived from ammonia by replacing one or more hydrogen atoms of ammonia by the alkyl groups. The amines can be classified as-

1. Primary amines ( ${\text{RNH}}_2$ ) - When one hydrogen of ammonia is replaced by the alkyl or aryl group.
2. Secondary amines ( ${\text{R}}_2\text{NH}$) - When two hydrogen atoms of ammonia are replaced by the alkyl or aryl groups.
3. Tertiary amine ( ${\text{R}}_3\text{N}$) - When all three hydrogen atoms of ammonia are replaced by the alkyl or aryl groups.

• The hydroxyl group can also be classified as 1° (primary), 2° (secondary) or 3°(tertiary).

1. Primary hydroxyl group- when the carbon attached to the hydroxyl group is attached to only one alkyl group. Ex- $RC{H}_{2}OH$
2. Secondary hydroxyl group- when the carbon attached to the hydroxyl group is attached to two alkyl groups. Ex- $R_{2}CHOH$
3. Tertiary hydroxyl group- when the carbon attached to the hydroxyl group is attached to three alkyl groups. Ex- $R_{3}COH$