Identify the Swarts reaction from the following:

Identify the Swarts reaction from the following:
  1. $\mathrm{R}-\mathrm{CH}_2-\mathrm{Br}+\mathrm{Nal} \xrightarrow[\text { acetone }]{\text { dry }} \mathrm{R}-\mathrm{CH}_2-\mathrm{I}+\mathrm{NaBr}$
  2. $2 \mathrm{R}-\mathrm{CH}_2-\mathrm{Br}+2 \mathrm{Na} \xrightarrow[\text { ether }]{\text { dry }}\mathrm{R}-\left(\mathrm{CH}_2\right)_2-\mathrm{R}+2 \mathrm{NaBr}$
  3. $2 \mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl}+2 \mathrm{Na} \xrightarrow[\text { ether }]{\text { dry }} \mathrm{C}_6 \mathrm{H}_5-\mathrm{C}_6 \mathrm{H}_5+2 \mathrm{NaCl}$
  4. $2 \mathrm{R}-\mathrm{CH}_2-\mathrm{Br}+\mathrm{CoF}_2 \longrightarrow 2 \mathrm{R}-\mathrm{CH}_2-\mathrm{F}+\mathrm{CoBr}_2$

Solution

The synthesis of alkyl flurorides is best accomplished by heating an alkyl chloride bromide in the presence of a metallic fluoride such as $\mathrm{AgF}_2, \mathrm{HgF}_2$ or $\mathrm{SbF}_3$. The reaction is termed as Swarts reaction.

Asked in: AP EAMCET 2024 (19 May Shift 2)

Practice more Halogen Derivatives questions on Aicharya