Organic Compounds Containing Halogens Question 202
Question: Replacement of $ Cl $ of chlorobenzene to give phenol requires drastic conditions but chlorine of 2,4-dinitrochlorobenzene is readily replaced. This is because
Options:
A) $ NO_2 $ makes the ring electron rich at ortho and para positions.
B) $ NO_2 $ withdraws $ {e^{-}} $ from meta-position.
C) $ NO_2 $ donates $ {e^{-}} $ at meta-position.
D) $ NO_2 $ withdraws $ {e^{-}} $ from ortho/para-positions.
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Answer:
Correct Answer: D
Solution:
[d] $ -NO_2 $ group withdraws electrons from o- and p-positions and hence activates the -Cl present on that position towards nucleophilic substitution.
BETA
