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Amines

Question
CBSEENCH12011138

Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80-1000C forms which one of the following products?

  • 1,2-dinitrobenzene

  • 1,3- dinitrobenzene

  • 1,4-dinitrobenzene

  • 1,2,4-trinitrobenzene

Solution

B.

1,3- dinitrobenzene

NO2 group being electron withdrawing reduces electron density at output positions. Hence, now the meta-position becomes electron rich on which the electrophile (nitronium ion) attacks during nitration.
HNO3 +H2SO4 ---> H2NO3+ +HSO-4 +H2O +NO2+