For each of the following pairs of E_2 reacti | vedclass

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(C) The correct answer is $(c)$.- In pair $(1)$ and $(2)$,$I^-$ is a better leaving group than $Cl^-$,so reaction $(2)$ is faster.- In pair $(3)$ and

Vedclass · Accepted Answer

$2, 3, 5$

Vedclass · Answer

(C) The correct answer is $(c)$.- In pair $(1)$ and $(2)$,$I^-$ is a better leaving group than $Cl^-$,so reaction $(2)$ is faster.- In pair $(3)$ and $(4)$,$CH_3O^-$ is a stronger base than $CH_3S^-$. Since $E_2$ reactions depend on the strength of the base,reaction $(3)$ is faster.- In pair $(5)$ and $(6)$,reaction $(5)$ involves a secondary alkyl halide where the $\beta$-hydrogen is benzylic,making the transition state more stable due to conjugation with the phenyl ring,leading to a faster reaction compared to $(6)$.Therefore,the set of faster reactions is $2, 3, 5$.

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