Question
How are amines classified depending on the functional group? Give one example of each class of amines.
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Answer
Classification of amines:
- Amines are classified as primary $(1^\circ )$, secondary $(2^\circ )$ and tertiary $(3^\circ )$ amines.
- Their structures are obtained in a simple way by replacing one, two, or three hydrogen atoms of $NH_3$ molecule by alkyl/aryl groups.
- The functional group present in primary amines is referred to as an amino group $(–NH_2)$.
e.g. Ethylamine $[C_2H_5 – NH_2]$ - The functional group present in secondary amines is referred to as the imino group $(>NH)$.
e.g. Dimethylamine $[(CH_3)_2NH]$ - The functional group present in tertiary amines is tertiary nitrogen represented as:
e.g. Trimethylamine $[(CH_3)_3N]$
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