Question:
Which pair is usually required for a nucleophilic aromatic substitution reaction?
Which pair is usually required for a nucleophilic aromatic substitution reaction?
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SNAr = Aryl halide + –NO$_2$ (o/p) + nucleophile.
Updated On: Apr 23, 2026
- An –NO$_2$ substitution and a strong electrophile
- A ring bearing a strong activating group and a strong acid
- An aryl halide with an –NO$_2$ and a strong nucleophile
- An unsubstituted benzene ring and a strong electrophile
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The Correct Option is C
Solution and Explanation
Concept:
Nucleophilic Aromatic Substitution (SNAr).
Step 1: Requires aryl halide (for leaving group).
Step 2: Needs strong electron-withdrawing group (–NO$_2$).
Step 3: –NO$_2$ stabilizes Meisenheimer intermediate.
Step 4: Reaction proceeds with strong nucleophile.
Conclusion:
Correct combination = (C)
Step 1: Requires aryl halide (for leaving group).
Step 2: Needs strong electron-withdrawing group (–NO$_2$).
Step 3: –NO$_2$ stabilizes Meisenheimer intermediate.
Step 4: Reaction proceeds with strong nucleophile.
Conclusion:
Correct combination = (C)
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