The correct order of rate of reaction towards | vedclass

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(A) The rate of nucleophilic addition reaction depends on the electrophilicity of the carbonyl carbon and steric hindrance. $1$. Aldehydes are more re

Vedclass · Accepted Answer

$a > b > c > d > e$

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(A) The rate of nucleophilic addition reaction depends on the electrophilicity of the carbonyl carbon and steric hindrance. $1$. Aldehydes are more reactive than ketones due to less steric hindrance and higher electrophilicity. Thus,$(a, b, c) > (d, e)$. $2$. Among aldehydes,electron-withdrawing groups increase the electrophilicity of the carbonyl carbon,while electron-donating groups decrease it. - $(a)$ has a $-NO_2$ group (strong electron-withdrawing),so it is most reactive. - $(b)$ is benzaldehyde. - $(c)$ has a $-OMe$ group (electron-donating by resonance),so it is least reactive among the aldehydes. Order for aldehydes: $a > b > c$. $3$. Among ketones,$(d)$ is an aliphatic ketone $(CH_3-CO-Et)$ and $(e)$ is an aromatic ketone (benzophenone). Aliphatic ketones are more reactive than aromatic ketones due to less steric hindrance and lack of resonance stabilization of the carbonyl group by the phenyl ring. Order for ketones: $d > e$. Combining these,the overall order is $a > b > c > d > e$.

The correct order of rate of reaction towards nucleophilic addition reaction for the following compounds is:

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