Which of the following species is most reacti | vedclass

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(C) In an $S_{N}2$ reaction,the rate of reaction depends on the ability of the leaving group to depart. Better leaving groups are weak bases,which are

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$CH_3-CH_2-I$

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(C) In an $S_{N}2$ reaction,the rate of reaction depends on the ability of the leaving group to depart. Better leaving groups are weak bases,which are the conjugate bases of strong acids. The leaving group ability follows the order: $I^- > Br^- > Cl^- > F^-$. Since $I^-$ is the best leaving group among the halides,$CH_3-CH_2-I$ is the most reactive species in an $S_{N}2$ reaction.

Which of the following species is most reactive in $S_{N}2$ reaction?

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