The order of reactivities of the following al | vedclass

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(D) In an $S_{N}2$ reaction,the rate of reaction depends on the ability of the leaving group to depart. The leaving group ability is determined by the

Vedclass · Accepted Answer

$RI > RBr > RCl > RF$

Vedclass · Answer

(D) In an $S_{N}2$ reaction,the rate of reaction depends on the ability of the leaving group to depart. The leaving group ability is determined by the strength of the $C-X$ bond and the stability of the halide ion $(X^-)$. The bond strength decreases as the size of the halogen increases $(C-F > C-Cl > C-Br > C-I)$. Consequently,the iodide ion $(I^-)$ is the best leaving group because it is the weakest base,while the fluoride ion $(F^-)$ is the poorest leaving group. Therefore,the order of reactivity for $S_{N}2$ reactions is $RI > RBr > RCl > RF$.

The order of reactivities of the following alkyl halides for an $S_{N}2$ reaction is:

Similar Questions

Indicate the correct order of bond energy for the following.

Which one of the following chlorohydrocarbons readily undergoes solvolysis?

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The correct pair$(s)$ of the ambident nucleophiles is (are):
$(A)$ $AgCN / KCN$
$(B)$ $RCOOAg / RCOOK$
$(C)$ $AgNO_{2} / KNO_{2}$
$(D)$ $AgI / KI$

The increasing rate of $S_N1$ reaction in the following compounds is:

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