Aromatic aldehydes are less reactive than the aliphatic aldehydes in nucleophilic addition reaction this is due to

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Aromatic aldehydes are less reactive than aliphatic aldehydes in nucleophilic addition reactions due to the electron-donating resonance effect (+R effect) of the aromatic ring. The electrons of the benzene ring are delocalized into the carbonyl group through resonance. This delocalization reduces the magnitude of the partial positive charge on the carbonyl carbon. As a result, the carbonyl carbon becomes less electrophilic, making it less susceptible to attack by a nucleophile compared to the carbonyl carbon in ali