In the presence of a small amount of phosphorous, aliphatic carboxylic acid reacts with chlorine or bromine…

In the presence of a small amount of phosphorous, aliphatic carboxylic acid reacts with chlorine or bromine to yield a reaction in which, α-hydrogen is been replaced by halogen. This reaction is known as
  1. Etard reaction
  2. Wolff-Kischner reaction
  3. Rosenmund reaction
  4. Hell-volhard-zelinsky reaction

Solution

This reaction is known as HVZ reaction.

Treatment with bromine and a catalytic amount of phosphorus leads to the selective α-bromination of carboxylic acids.

Asked in: JEE Main 2015 (10 Apr Online)

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