QuestionOrganic / nitration of amines
The major product formed in the reaction of N,N-dimethylaniline with concentrated H₂SO₄/HNO₃ mixture is:

- (a) m-Nitro-N,N-dimethylaniline
- (b) p-Nitro-N,N-dimethylaniline
- (c) o-Nitro-N,N-dimethylaniline
- (d) 2,4-Dinitro-N,N-dimethylaniline
Answer: (a)
In conc. H₂SO₄/HNO₃ the NMe₂ group is protonated to −N⁺HMe₂, a strong meta-director (−I). Major product m-nitro-N,N-dimethylaniline → (a).