How is ethyl chloride prepared from alcohol using thionyl chloride?
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Thionyl chloride is preferred for preparing alkyl chlorides from alcohols because the by-products formed in the reaction are SO2SOX2 and HClHCl which are in gaseous form and escape into the atmosphere leaving behind pure alkyl chlorides.
CH3CH2−OH+SOCl2⟶CH3CH2−Cl+SO2↑+HCl
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