When one or more hydrogen atoms of ammonia molecule are replaced by alkyl or aryl group amines are formed. These are also called derivatives of ammonia.
Classification of amines: Amines can be classified into three categories:
I.Primary amines: If one hydrogen atom is replaced by R or Ar, we get a primary amine.
II.Secondary amines: If two hydrogen atoms are replaced by alkyl or aryl group we get a secondary amine.
III.Tertiary amines: If three hydrogen atoms are replaced by alkyl or aryl group, we get a tertiary amine.