At which atom of the following structure will a nucleophile attack?

Question

Quizplus · Accepted Answer

Nucleophiles are electron-rich species that attack electron-poor sites in molecules. The most commonly attacked atoms are carbonyl carbons because they have a partial positive charge and are electron deficient. In this structure, the carbonyl carbon is the only atom that fits this description, so it is the most likely site for a nucleophile attack. The other atoms are either electron rich (oxygen atoms) or not reactive towards nucleophiles (methyl carbon and aldehyde hydrogen).

At Which Atom of the Following Structure Will a Nucleophile