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The addition of HI in the presence of peroxide catalyst does not follow anti-Markovnikov's rule because :

Options

  1. AHI is a strong reducing agent.
  2. BH-I bond is too strong to be broken homolytically.
  3. CI atom combines with H atom to give back HI .
  4. DIodine atom is not reactive enough to add across a double bond.

Correct answer

D. Iodine atom is not reactive enough to add across a double bond.

Step-by-step solution

HI does not exhibit peroxide effect. HI bond although dissociates easily into iodine radicals, they being bigger in size are not much reactive but recombine together to form iodine molecule.

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