Which of the following alkyl halides is most | vedclass

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(B) The $S_{N}1$ mechanism involves the formation of a carbocation as the rate-determining step. Since the carbocation formed is the same for all give

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$(CH_3)_3C-I$

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(B) The $S_{N}1$ mechanism involves the formation of a carbocation as the rate-determining step. Since the carbocation formed is the same for all given options $((CH_3)_3C^+)$,the rate of the reaction depends on the ease of leaving group departure. The bond dissociation energy of the $C-X$ bond decreases as the size of the halogen atom increases $(F Therefore,the $C-I$ bond is the weakest and breaks most easily. Thus,$(CH_3)_3C-I$ is the most reactive towards $S_{N}1$ substitution.

Which of the following alkyl halides is most reactive towards substitution by the $S_{N}1$ mechanism?

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