The order of reactivities of methyl halides i | vedclass

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(A) The formation of a Grignard reagent $(R-Mg-X)$ involves the oxidative insertion of magnesium into the carbon-halogen bond.The reactivity depends o

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$CH_3I > CH_3Br > CH_3Cl$

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(A) The formation of a Grignard reagent $(R-Mg-X)$ involves the oxidative insertion of magnesium into the carbon-halogen bond.The reactivity depends on the strength of the $C-X$ bond.As the size of the halogen atom increases,the $C-X$ bond length increases and the bond dissociation energy decreases.Therefore,the ease of reaction follows the order of the leaving group ability: $I^- > Br^- > Cl^-$.Thus,the order of reactivity is $CH_3I > CH_3Br > CH_3Cl$.

The order of reactivities of methyl halides in the formation of Grignard reagent is

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