Discuss the role of Lewis acids in the preparation of aryl bromides an

1.	Discuss the role of Lewis acids in the preparation of aryl bromides and chlorides in the dark.
Answer» Solution :Lewis ACIDS help to generate electrophile during the bromination and chlorination. `CI_(2) + FeCl _(3) to FeCl_(4)^(-) + underset(underset("(Electrophile)")("Chloronium ion"))(Cl^(+))` `Br_(2)+ FeBr_(3) to FeBr_(4)^(-) + underset(underset("(Electrophile)")("Bromonium ion"))(Br^(+))` The electrophile then attacks the benzene ring to FORM a CARBOCATION, which loses a PROTON to form aryl CHLORIDE or aryl bromide.

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