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  4. Which reaction is useful in exchange of halogen in alkyl chloride by iodide?

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Q. Which reaction is useful in exchange of halogen in alkyl chloride by iodide?

MHT CETMHT CET 2019Haloalkanes and Haloarenes

Solution:

The reaction is useful in exchange of halogen in alkyl chloride by iodide is Finkelstein reaction. This reaction is used in preparation of alkyl iodide by the reaction of alkyl chloride, bromide with $NaI$ in dry acetone

e.g. $CH _{3} CH _{2} Br + NaI \xrightarrow[{\Delta}]{\text{Acetone} } CH_3CH_2I+NaBr$