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MHT CET Medical202624 April 2026Evening ShiftChemistryHydrocarbonsActual

Identify the major product of the reaction between propene and HBr in the presence of peroxide.

Options

  1. A1-Bromopropane
  2. B2-Bromopropane
  3. C1,2-Dibromopropane
  4. D3-Bromopropene

Correct answer

A. 1-Bromopropane

Step-by-step solution

The reaction of propene with HBr in the presence of peroxide proceeds via a free radical mechanism, known as the peroxide effect or Kharasch effect. This leads to anti-Markovnikov addition. The peroxide initiates the reaction by generating a bromine free radical ( Br^ ) from HBr . The bromine free radical adds to the terminal carbon of propene to generate a more stable secondary free radical: CH₃-CH=CH₂ + Br^ CH₃-CH^ -CH₂Br The secondary free radical then abstracts a hydrogen atom from another HBr molecule to form

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