The ease of dehydrohalogenation of alkyl hali | vedclass

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(B) Dehydrohalogenation of alkyl halides with alcoholic $KOH$ follows the $E_2$ mechanism.In this reaction, the rate-determining step involves the for

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$3^{\circ} > 2^{\circ} > 1^{\circ}$

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(B) Dehydrohalogenation of alkyl halides with alcoholic $KOH$ follows the $E_2$ mechanism.In this reaction, the rate-determining step involves the formation of an alkene.The stability of the resulting alkene is the primary driving force for the reaction.According to Saytzeff's rule, more substituted alkenes are more stable.Since tertiary $(3^{\circ})$ alkyl halides form the most substituted (and thus most stable) alkenes, they react the fastest.Therefore, the order of reactivity is $3^{\circ} > 2^{\circ} > 1^{\circ}$.

The ease of dehydrohalogenation of alkyl halide with alcoholic $KOH$ is:

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