IGNOU BCHCT 133 2026 - Write the mechanism of chlorination of methyl benzene.

Question

Write the mechanism of chlorination of methyl benzene.

19 Jan 2026

Answer :

Word Count : 201

The chlorination of methyl benzene (toluene) occurs via a free radical substitution mechanism under the presence of light or heat. The mechanism involves three main steps: initiation, propagation, and termination. 1. Initiation: The chlorine molecule (Cl₂) absorbs energy from light (hv) and undergoes homolytic cleavage to form two chlorine radicals. [ Cl_2 \xrightarrow{hv} 2Cl\cdot ] 2. Propagation: This step involves a series of reactions where radicals react to form the

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