Chemistry - Carbonyl compounds Question with Solution | TestHub

There are 4 compounds that undergo a faster nucleophilic addition reaction than the reference compound.

* Mechanism: Nucleophilic addition to a carbonyl group is favored by electron-withdrawing groups (EWGs) and hydrogen ($-$H) because they increase the positive charge density on the carbonyl carbon, making it more electrophilic.

* Reference Compound: The given compound has a para-methyl ($-$CH₃) group, which is an electron-donating group ($+I$ and hyperconjugation) that reduces reactivity.

* Faster Compounds:

* (b) $-$Cl (electron-withdrawing via $-I$)

* (c) $-$NO₂ (strong electron-withdrawing via $-R,-I$)

* (f) $-$C$\equiv$N (strong electron-withdrawing via $-R,-I$)

* (g) $-$H (less electron-donating than $-$CH₃)