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MHT CET202520 Apr 2025Evening ShiftChemistryHaloalkanes and HaloarenesActual

The correct order of reactivity for reaction involving cleavage of C-X bond in following compounds is

Options

  1. AI > II > III
  2. BII > III > I
  3. CIII > I > II
  4. DIII > II > I

Correct answer

D. III > II > I

Step-by-step solution

Nucleophilic aromatic substitution (S N Ar) reactivity in haloarenes depends critically on electron-withdrawing group stabilization of the Meisenheimer complex. Compound I (1-chloro-4-nitrobenzene) has a single nitro group para to chlorine, providing moderate stabilization. Compound II (1-chloro-2,4-dinitrobenzene) features two nitro groups (ortho and para), offering enhanced stabilization through combined resonance and inductive effects. Compound III (1-chloro-2,4,6-trinitrobenzene) possesses three nitro groups (t

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