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Hell-Volhard-Zelinsky Reaction

About Hell-Volhard-Zelinsky Reaction

In the presence of phosphorus, aliphatic carboxylic acids react smoothly with chlorine or bromine to yield a compound in which α-hydrogen has been replaced by halogen such reaction is know as Hell-Volhard-Zelinsky Reaction

Hell-Volhard-Zelinsky Reaction

The function of the phosphorus is ultimately to convert a little of the acid into acid halide so it is the acid halide, not the acid itself, that undergoes this reaction.

  • P + X2 ⎯→ PX3
  • R – CH2 – COOH + PX3  ⎯→ RCH2 – COX

Reaction Mechanism of Hell-Volhard-Zelinsky Reaction

Reaction Mechanism of Hell-Volhard-Zelinsky Reaction

Application of Hell-Volhard-Zelinsky Reaction

The halogen of these halogenated acids undergoes nucleophilic displacement and elimination much as it does in the simple alkyl halides. Halogenation is therefore the first step in the conversion of a carboxylic acid into many important substituted carboxylic acid.

examples of Hell-Volhard-Zelinsky Reaction

List of Name Reaction of Organic Chemistry consist of detail Reaction Mechanism of all name reactions of Organic Chemistry.

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