During the generation of the nitronium ion (+) for the nitration of benzene, concentrated and concentrated are mixed. What is the specific mechanistic role of in this mixture?

Question

During the generation of the nitronium ion ($NO_2$+) for the nitration of benzene, concentrated $HNO_3$ and concentrated $H_2SO_4$ are mixed. What is the specific mechanistic role of $HNO_3$ in this mixture?

Prashant Kotian · Accepted Answer

Correct answer: B. Sulfuric acid is a stronger acid than nitric acid. Therefore, HNO3 acts as a Bronsted base, accepting a proton to form H2O+-NO2, which immediately loses water to generate the powerful NO2+ electrophile.

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