Which of the following is most reactive towar | vedclass

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(D) The reactivity of alkyl halides towards $S_N2$ reactions depends on two main factors: steric hindrance and the nature of the leaving group.$1.$ St

Vedclass · Accepted Answer

Cyclohexyl-CH_2-$I$

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(D) The reactivity of alkyl halides towards $S_N2$ reactions depends on two main factors: steric hindrance and the nature of the leaving group.$1.$ Steric hindrance: $S_N2$ reactions are highly sensitive to steric hindrance. Primary alkyl halides are more reactive than secondary or tertiary alkyl halides because the nucleophile can easily approach the carbon atom.$2.$ Leaving group: $A$ better leaving group increases the rate of the $S_N2$ reaction. Iodide $(I^-)$ is a better leaving group than chloride $(Cl^-)$ because it is a weaker base.Comparing the given options:- Option $A$ and $D$ are primary alkyl halides,while $B$ and $C$ are secondary alkyl halides. Therefore,$A$ and $D$ are more reactive than $B$ and $C$.- Between $A$ $(R-CH_2-Cl)$ and $D$ $(R-CH_2-I)$,$D$ is more reactive because $I^-$ is a better leaving group than $Cl^-$.Thus,Cyclohexyl-CH_2-$I$ is the most reactive towards $S_N2$ reaction.

Which of the following is most reactive towards $S_N2$ reaction?

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