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Why is benzaldehyde less reactive than propanal?
ARing resonance reduces carbon's electrophilicity
BThe ring makes the molecule more hindered
CIts carbonyl bond is not polar at all
DPropanal has an acidic hydrogen on carbon
Answer & Solution
Correct answer: A. Ring resonance reduces carbon's electrophilicity
Conjugation with the benzene ring delocalises charge towards the carbonyl carbon, which reduces its positive character.
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