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Question
Write the reactions involved Hell-Volhard Zelinsky reaction?
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Solution
Hell-Volhard Zelinsky reaction: Carboxylic acid having α-hydrogen are halogenated at α- position on treatment with chlorine or bromine in the presence of red phosphorous to give α-halogenated carboxylic acid.
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\[\begin{array}{cc}
\ce{O}\phantom{...............................................}\\
||\phantom{...............................................}\\
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\end{array}\]
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