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Explain the alpha- halogenation take place in acetic acid. (or) Explain Hell-Volhard-zelinsky reaction (HVZ reaction)? |
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Answer» Solution :`underset(" Acetic ACID")(CH_3 - COOH) underset(H_2O)overset(Cl_2//RED P_4)(to) underset (alpha -" Chloro ethanoic acid")( undersetoverset(|)(Cl)(C ) H_2 - COOH)` Carboxylic ACIDS having an `alpha` - hydrogen are halogenated at the `alpha` - position on TREATMENT with chlorine or bromine in the presence of small amount of red PHOSPHORUS to form `alpha` - halo carboxylic acids. This reaction is known as Hell – Volhard – Zelinsky reaction (HVZ reaction) |
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