Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80-1000C forms which one of the following products?
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+
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
Which of the following compounds will not undergo Friedel -Craft's reaction easily?