The correct order of reactivity for the addit | vedclass

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Question

(A) The correct order of reactivity for the nucleophilic addition reaction of the given carbonyl compounds with ethylmagnesium iodide is $I > III > II

Vedclass · Accepted Answer

$I > III > II > IV$

Vedclass · Answer

(A) The correct order of reactivity for the nucleophilic addition reaction of the given carbonyl compounds with ethylmagnesium iodide is $I > III > II > IV$. This order is determined by two primary factors: $(i)$ Inductive effect: Alkyl groups are electron-releasing. As the number of alkyl groups attached to the carbonyl carbon increases, the electron density on the carbonyl carbon increases, which reduces its electrophilicity and thus decreases reactivity towards nucleophilic attack. $(ii)$ Steric effect: As the number and size of alkyl groups attached to the carbonyl carbon increase, the steric hindrance around the carbonyl carbon increases, making it more difficult for the nucleophile to attack. Therefore, formaldehyde $(I)$ is the most reactive, followed by acetaldehyde $(III)$, acetone $(II)$, and finally di-tert-butyl ketone $(IV)$.

The correct order of reactivity for the addition reaction of the following carbonyl compounds with ethylmagnesium iodide is:

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