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Arrange the following in the correct order of their reactivity towards nucleophilic addition reactions
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The correct answer is:
III $>$ I $>$ IV $>$ II
The reactivity of a substrate towards nucleophilic addition reactions depends on the groups attached to the carbonyl carbon that affect the charge density on it. III is most reactive due to absence of electron-donating $-\mathrm{CH}_3$ groups that are present on other compounds. II is least reactive due $-\mathrm{CH}_3$ and $-\mathrm{NH}_2$ that greatly increase the charge density on carbonyl carbon, making it least prone to nucleophilic attack.
Among $\mathrm{I}$ and IV, I is more reactive due to only one $-\mathrm{CH}_3$ group.
Thus, the order will be III $>$ I $>$ IV $>$ II.
Among $\mathrm{I}$ and IV, I is more reactive due to only one $-\mathrm{CH}_3$ group.
Thus, the order will be III $>$ I $>$ IV $>$ II.
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