Which is not a meta directing group:
Correct answer: C. NH2
- A. NO2
- B. COOH
- C. NH2
- D. COR
Explanation
This is correct because -NH₂ is an electron-donating group due to its +M (resonance) effect. It activates the benzene ring and directs electrophiles to the ortho and para positions, making it not a meta-directing group.
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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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