Question

Which among the following methods is not suitable for the preparation of alkyl chlorides?

विकल्प

• Addition of HCI to alkene

• Treating alcohols with Lucas reagent

• By heating alcohols with thionyl chloride

• Chlorination of alkanes in presence of sunlight

Answer 1

Chlorination of alkanes in presence of sunlight

Explanation:

Alkanes are chlorinated. The synthesis of alkyl chloride in the presence of sunlight is not recommended because chlorination of alkanes produces a complicated mixture of isomeric mono and polyhaloalkanes that is difficult to separate as pure chemicals. As a result, the yield of each chemical is minimal.

\[\ce{CH3CH2CH2CH3 ->[Cl2/UV light] CH3CH2CH2CH2Cl + CH3CH2CHClCH3}\]