In the given pairs of alkyl halides,in which | vedclass

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(D) The reactivity of alkyl halides toward $S_N2$ reactions depends on steric hindrance and the nature of the leaving group.In option $D$,the first co

Vedclass · Accepted Answer

$CH_2=CH-CH_2-Cl$ or $CH_2=CH-Cl$

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(D) The reactivity of alkyl halides toward $S_N2$ reactions depends on steric hindrance and the nature of the leaving group.In option $D$,the first compound is allyl chloride $(CH_2=CH-CH_2-Cl)$,which is a primary alkyl halide and highly reactive toward $S_N2$ due to resonance stabilization of the transition state.The second compound is vinyl chloride $(CH_2=CH-Cl)$,where the $C-Cl$ bond has partial double bond character due to resonance,making it very unreactive toward nucleophilic substitution.Therefore,the first compound is significantly more reactive than the second.

In the given pairs of alkyl halides,in which pair is the first compound more reactive than the second compound toward $S_N2$ reaction?

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