Alkyl halide from halogen exchange:
In this reaction, alkyl halides are prepared from alkyl halides only.
For Example:
R – Cl + Nal \(\overset{\Delta}{\underset{Acetone}{\longrightarrow}}\) R – I + NaCl
R – Br + Nal \(\overset{\Delta}{\underset{Acetone}{\longrightarrow}}\) R – I + NaBr
This reaction is known as the Finkelstein reaction. The synthesis of alkyl fluoride is best accomplished by heating alkyl iodide in the presence of a metallic fluoride such as AgF. This reaction is called “Swarts reaction”.
R – I + AgF → R -F + Agl
