Which of the following is meta directing group in the electrophilic substitution reactions of monosubstituted benzene?
Correct answer: C. -SO3H
- A. -NH2
- B. -OCH3
- C. -SO3H
- D. -OH
Explanation
-SO3H is correct because the sulfonic acid group is meta-directing in electrophilic substitution reactions of monosubstituted benzene due to its strong electron-withdrawing effect.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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