Question

Which among the following is an allylic halide?

• A. 1-Bromopropene
• B. 2-Bromopropene
• C. 3-Bromopropene
• D. 4-Bromobut-1-ene

Hint:

Allylic: $X$ on $sp^3$ C next to $C=C$. Vinylic: $X$ directly on $sp^2$ C of $C=C$.

Answer 1

The Correct Option is C

Step 1: Concept An allylic halide is a compound where the halogen atom is bonded to an $sp^3$ hybridized carbon atom which is next to a carbon-carbon double bond.

Step 2: Meaning The general structure of an allylic group is $C=C-C-X$.

Step 3: Analysis In 3-bromopropene ($CH_2=CH-CH_2Br$), the bromine is attached to the carbon adjacent to the double bond.

Step 4: Conclusion Therefore, 3-bromopropene is the allylic halide among the given options. Final Answer: (C)