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Question
Which of the following is most reactive towards sulphonation?
Which of the following is most reactive towards sulphonation?
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Solution
The correct option is A m-Xylene
Methyl group activates the benzene ring towards electrophilic aromatic substitution reactions.
In meta xylene, the hydrogen atom to be replaced is either ortho to both methyl groups or ortho to one methyl group and para to another methyl group.
In ortho and para xylene, the hydrogen to be replaced is ortho to one methyl group and meta to other methyl groups.
Hence, meta xylene is most reactive towards sulphonation.
Option A is correct.
Methyl group activates the benzene ring towards electrophilic aromatic substitution reactions.
In meta xylene, the hydrogen atom to be replaced is either ortho to both methyl groups or ortho to one methyl group and para to another methyl group.
In ortho and para xylene, the hydrogen to be replaced is ortho to one methyl group and meta to other methyl groups.
Hence, meta xylene is most reactive towards sulphonation.
Option A is correct.
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