Which one of the following species is ortho and para director:
Correct answer: D. Cl
- A. CHO
- B. -SO3H
- C. -NO2
- D. Cl
Explanation
Chlorine withdraws electrons through inductive effect and releases electrons through resonance. Hence, chlorine is ortho, para-directing in electrophilic aromatic substitution reaction.
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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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