aniline does not undergo friedel craft reaction. why ?
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Aniline do not undergo friedel crafts reactions because AlCl3 which is used as a Lewis acid and a catalyst in friedel crafts reactions being electron deficient acts as Lewis base and attacks on the lone pair of nitrogen present in aniline to form an insoluble complex which precipitates out and the reaction does not
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A Friedel - crafts reaction is carried out in the presence of anhydrous AlCl3. But AlCl3, used as a catalyst is acidic in nature i.e., Lewis acid whereas aniline is a strong lewis base. thus, aniline reacts with AlCl3 to form a salt.
Due to the positive charge on the N- atom, electrophilic substitution in the benzene ring is deactivated. hence, aniline does not undergo Friedel-crafts reaction
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