Write short notes on the
Finkelstein reaction

Explanation

Finkelstein reaction. An alkyl iodide may be prepared by treating an alkyl chloride or bromide with sodium iodide in acetone. The chlorine or bromine atom of the alkyl halide is replaced by iodine atom in the reaction.
` underset("Chloroethane")(CH_3-CH_2 - Cl )+Nal underset("reflux")overset("Acetone")to underset("Iodoethane")(CH_3 -CH_2 I + NaCl`
` underset("Bromoethane ")(CH_3 -CH_2 -Br + Nal ) underset("reflux")overset( " Acetone")to underset("Iodoethane")(CH_3 -CH_3-I + NaBr`