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JEE Main Chemistry question

ChemistryHaloalkanes and HaloarenesJEE Main

How many of the following groups, if substituted at the - and/or -positions of chlorobenzene, increase its reactivity towards nucleophilic substitution?

, , , ,

Answer: 3

Solution

Nucleophilic aromatic substitution on an aryl halide is accelerated by electron-withdrawing groups at the ortho/para positions, which stabilise the anionic Meisenheimer-complex intermediate. , and are all electron-withdrawing and

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Question ID VK-148372