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Give reasons: (i) Aniline does not undergo Friedal Crafts reaction. (ii) Aromatic primary amines cannot be prepared by Gabriel,s phthalimide synthesis. (ii) Aliphatic amines are stronger bases than ammonia. |
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Answer» Solution :(i) The amino GROUP reacts with anhydrous `AlCl_3` which is used as a catalyst in Friedel Crafts reactionAs `AlCl_3` is not available for the reaction, the reaction does not take PLACE. (ii) This is because aryl halide does not undergo nucleophilic substitution with the anion formed by PHTHALIMIDE. (iii) Alkyl groups are electron donating `R to NH_2` they increase the electron density on N and make the compound more basic. |
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