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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