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MHT CET Medical202625 April 2026Morning ShiftChemistryHaloalkanes and HaloarenesActual

Which of the following is not an allylic halide?

Options

  1. A4-bromopent-2-ene
  2. B3-bromo-2-methylbut-1-ene
  3. C1-bromobut-2-ene
  4. D4-bromobut-1-ene

Correct answer

D. 4-bromobut-1-ene

Step-by-step solution

An allylic halide is a compound in which the halogen atom is bonded to an sp^3 hybridized carbon atom that is adjacent to a carbon-carbon double bond. Let us examine the structure of each option: 4-bromopent-2-ene: CH₃-CH=CH-CH(Br)-CH₃ The bromine atom is attached to C4, which is an sp^3 carbon adjacent to the C2=C3 double bond. It is an allylic halide. 3-bromo-2-methylbut-1-ene: CH₂=C(CH₃)-CH(Br)-CH₃ The bromine atom is attached to C3, which is an sp^3 carbon adjacent to the C1=C2 double bond. It is an allylic hal

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