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Question
How are amines classified depending on the functional group? Give one example of each class of amines.
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Solution
Classification of amines:
- Amines are classified as primary (1°), secondary (2°) and tertiary (3°) amines.
- Their structures are obtained in a simple way by replacing one, two, or three hydrogen atoms of NH3 molecule by alkyl/aryl groups.
- The functional group present in primary amines is referred to as an amino group (–NH2).
e.g. Ethylamine [C2H5 – NH2] - The functional group present in secondary amines is referred to as the imino group (>NH).
e.g. Dimethylamine [(CH3)2NH] - The functional group present in tertiary amines is tertiary nitrogen represented as:
e.g. Trimethylamine [(CH3)3N]
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