MHT CET Medical202625 April 2026Morning ShiftChemistryHaloalkanes and HaloarenesActual
Which of the following is not an allylic halide?
Options
- A4-bromopent-2-ene
- B3-bromo-2-methylbut-1-ene
- C1-bromobut-2-ene
- 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