A) \[C{{H}_{3}}COC{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\]
B) \[C{{H}_{3}}C{{H}_{2}}OC{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\]
C) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}CHO\]
D) \[C{{H}_{3}}-C{{H}_{2}}-CO-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}\]
Correct Answer: C
Solution :
The case with which a nucleophile attacks the carbonyl groups depends upon the electron-deficiency, i. e., magnitude of the positive charge on the carbonyl carbon. Since an alkyl groups has electron-donating inductive effect (+7 effect), therefore, greater the number of alkyl groups attached to the carbonyl group greater is the electron-density on the carbonyl carbon and hence, lower is its reactivity towards nucleophilic addition reactions.
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