In the presence of a small amount of phosphor | vedclass

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(D) The reaction described is the Hell-Volhard-Zelinsky $(HVZ)$ reaction.In this reaction,aliphatic carboxylic acids containing at least one $\alpha$-

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Hell-Volhard-Zelinsky reaction

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(D) The reaction described is the Hell-Volhard-Zelinsky $(HVZ)$ reaction.In this reaction,aliphatic carboxylic acids containing at least one $\alpha$-hydrogen atom are reacted with chlorine or bromine in the presence of a small amount of red phosphorus.The $\alpha$-hydrogen is replaced by a halogen atom to form $\alpha$-halo carboxylic acids.The general chemical equation is: $R-CH_2-COOH + X_2 \xrightarrow{	ext{red } P} R-CH(X)-COOH + HX$,where $X = Cl, Br$.

In the presence of a small amount of phosphorus,aliphatic carboxylic acids react with chlorine or bromine to yield a compound in which $\alpha$-hydrogen has been replaced by a halogen. This reaction is known as:

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