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JEE Main Chemistry question

ChemistryAromatic Compounds and Aryl HalidesJEE Main

How many of the following groups are *meta*-directing, deactivating groups: –Br, –CF, –COR, –CN, –NHCOR, –CH, –COOH?

Answer: 4

Solution

–CF, –COR (acyl), –CN and –COOH are all strongly electron-withdrawing (by induction and/or resonance) and *meta*-directing. –Br, though deactivating overall, is an *ortho*/*para*-director (its lone-pair resonance donation outweighs

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Question ID VK-142909