Which reaction is used for the preparation of `alpha`-Bromoacetic acid ?

Options

A. Kolbe’s reaction
B. Reimer-Tiemann reaction
C. Hell Volhard Zelinsky reaction
D. Perkin’s reaction

Answer

C

Explanation

When `Cl_(2)` or `Br_(2)` is react with carboxylic acid in the presence of red phosphorus then α-hydrogen of carboxylic acid is replaced by `Cl_(2)` or `Br_(2)`
`underset("Acetic acid")(CH_(3)COOH) overset(Br_(2))to underset(alpha-"Bromoacetic acid")(CH_(2)BrCOOH)`
This reaction is known as Hell Volhard Zelinsky reaction.