Amines are organic compound obtained from ammonia by replacement of one or more hydrogen atoms by organic groups. If one of the 'H' atom of NH3 is replace by R = alkyl group, they are referred as primary amine. If two 'H' atoms of NH3 are replace by same or different alkyl group, they are referred as secondary amine.
Answer: general representation of a secondary amine is [tex]R_2NH[/tex] .
Explanation: Ammonia is [tex]NH_3[/tex] . When one or more H atoms of ammonia molecule are replaced by alkyl groups then the newly formed compounds are known as amines.
If one of the H atom from ammonia molecule is replaced by an alkyl group then we call it primary amine. It's written as [tex]RNH_2[/tex] .
If two H atoms of ammonia molecule are replaced by same or different alkyl groups then we call it secondary amine. It's written as [tex]R_2NH[/tex] and if all the three H atoms of ammonia molecule are replaced by same or different alkyl groups then we call it tertiary amine. It is written as [tex]R_3N[/tex] .
So, the general representation of a secondary amine is [tex]R_2NH[/tex] .
