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When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed?

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in Chemistry – Class 12 by (188k points)
When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed?

(a) ortho and meta

(b) ortho and para

(c) meta and para

(d) ortho, meta and para

I have been asked this question in homework.

The origin of the question is Preparation of Haloarenes in portion Haloalkanes and Haloarenes of Chemistry – Class 12

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Correct option is (b) ortho and para

The best explanation: When excess halogen is used, the second halogen also gets incorporated into the aromatic ring at ortho and para positions with respect to the first halogen. This is because the CH3 group in toluene is ortho and para directing.

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