Question

The replacement of diazonium group by fluorine is known as:

• A. Gattermann reaction
• B. Sandmeyer reaction
• C. Balz-Schiemann reaction
• D. Etard reaction

Answer 1

The correct option is C Balz-Schiemann reaction

The Balz- Schiemann reaction is a chemical reaction in which anilines are transformed to aryl fluorides via diazonium fluoroborates.

$\underset{1}{Ar-N{H}_2}\underset{HB{F}_4}{\overset{HN{O}_2}{\to }}\underset{2}{\stackrel{B{F}_4^{-}}{Ar-\underset{+}{N}\equiv N}}\underset{-N2}{\overset{\Delta }{\to }}\underset{3}{Ar-F}+B{F}_3$

1-anilines.

2-diazonium salt.

3-aryl fluoride.

Option C is correct.