Which among the following is not an allylic halide.

Question

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An allylic halide is a compound in which the halogen atom is bonded to an $s p^{3}$ hybridized carbon atom that is directly attached to a carbon-carbon double bond ( $C=C$ ).

In $CH_{2} = CH - CH_{2} - X$ , the halogen is attached to an allylic carbon.

In $CH_{3} - CH = CH - CH_{2} - X$ , the halogen is attached to an allylic carbon.

In $CH_{3} - CH_{2} - CH = CH - CH_{2} - X$ , the halogen is attached to an allylic carbon.

In $CH_{3} - CH = CH - CH_{2} - CH_{2} - X$ , the halogen is bonded to an $s p^{3}$ carbon that is separated from the double bond by another $s p^{3}$ carbon. Therefore, it is not an allylic halide.

Answer: $CH_{3} - CH = CH - CH_{2} - CH_{2} - X$

Chemistry - Halogen Derivative Question with Solution | TestHub

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