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JIPMER 2010
Exam
JIPMER
Year
2010
Subject
Chemistry
Chapter
Hydrocarbons

JIPMER 2010 · Chemistry · Hydrocarbons

The only o p-directing group which is deactivating in nature is

The only o p-directing group which is deactivating in nature is

Options

  1. A−NH2-\mathrm{NH}_2
  2. B-OH
  3. C−X-X (halogens)
  4. D−R-R (alkyl groups)

Correct answer

C. −X-X (halogens)

Step-by-step solution

−NH2,−OH-\mathrm{NH}_2,-\mathrm{OH} and −R-R (alkyl groups) all are o/po / \mathrm{p}-directing and they activates the benzene ring −X-X (halogens) are however o/po / p-directing but deactivate the benzene ring by withdrawing electrons from the ring due to −I-I effect.
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