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• Amines can be defined as compounds where alkyl or aryl groups are attached to nitrogen in place of hydrogen atoms in ammonia. Amines are classified as primary, secondary and tertiary. Unlike the alkyl halides and alcohols, the amines are classified according to the number of alkyl or aryl groups attached to the nitrogen atom. […]http://www.chemguide.co.uk/organicprops/amines/primstructs.gif