Which of the following reactions is used to prepare aryl fluorides from diazonium salts and fluoroboric acid ? (A) Sandmeyer reaction (B) BalzSchiemann reaction (C) Gattermann reaction (D) Swarts reaction

Home » Which of the following reactions is used to prepare aryl fluorides from diazonium salts and fluoroboric acid ? (A) Sandmeyer reaction (B) BalzSchiemann reaction (C) Gattermann reaction (D) Swarts reaction

Chemistry

Which of the following reactions is used to prepare aryl fluorides from diazonium salts and fluoroboric acid ? (A) Sandmeyer reaction (B) BalzSchiemann reaction (C) Gattermann reaction (D) Swarts reaction

Correct option is B Balz-Schiemann reaction

EXPLANATION:

Balz-Schiemann reaction is used to prepare aryl fluorides from diazonium salts and fluoroboric acid.
$\mathrm{Ar}-\mathrm{N}_{2} \mathrm{X} \stackrel{\mathrm{HBF}_{4}}{\longrightarrow} \mathrm{Ar}-\mathrm{N}_{2} \mathrm{BF}_{4}^{-} \stackrel{\Delta}{\longrightarrow} \mathrm{Ar}-\mathrm{F}+\mathrm{BF}_{3}+\mathrm{N}_{2} \uparrow$

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