Why para nitro benzaldehyde is more reactive towards nucleophilic than benzaldehyde????
Why para methyl benzaldehyde is less reactive towards nucleophilic than benzaldehyde????
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Aldehyde group withdraws electrontowards itself by resonance resulting in decrease of polarity of C-O bond .this makes it a weak electrophilic centre .in propanal no resonance happens .so benzaldehyde is less reactive than propanal in nucleophilicreaction.
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