MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryAlkyl and Aryl HalidesE elimination follows an antiperiplanar structure

Assertion: Allyl halide (CH2=CH–CH2X) is more reactive than CH3CH2CH2X in a SN2 reaction. Reason: Allyl halide forms a resonance stabilized carbocation

A.A (b) B

C.C (d) D

Explanation

Allylic halides exhibit faster SN2 reactivity than alkyl halide because the bimolecular transition state is stabilized by hyperconjugation between the orbital of nucleophile and conjugate bond of the allylic group. Hence, the correct answer is an option (b)

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