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Electrophilic SubstitutionAmines

Which reaction is used to prepare Fluorobenzene from aniline? (Hint: Not Sandmeyer).

Expert Answer

Balz-Schiemann Reaction. Aniline is diazotized to Ar−N2+BF4−Ar-N_2^+ BF_4^- , which is then heated to yield Ar−FAr-F . (Sandmeyer cannot prepare fluorobenzene)

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