Ncert Exercises & Solutions

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is:

1. Electrophilic elimination reaction

2. Electrophilic substitution reaction

3. Free radical addition reaction

4. Nucleophilic substitution reaction

Toluene reacts with a Cl₂in the presence of lewis acid Ferric chloride which facilitates Cl⁺ electrophile generation. The formed Cl⁺ electrophile will give aromatic electrophilic substitution reaction to form ortho and para chloro compounds. The systematic mechanism of this chlorination will be shown below.

In this mechanism, electrophile Cl* prefer to attack at elecronically rich position of aromatic ring and replaces H+, Hence mechanism will Aromatic electrophilic substitution.

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