Compare the reactivity order of benzaldehyde, p -tolualdehyde and p - – InterviewSolution

1.	Compare the reactivity order of benzaldehyde, p -tolualdehyde and p - nitrobenzaldehyde.
Answer» Solution :Order of reactivity p - tolualdehyde `LT` benzaldehyde `lt` p - NITROBENZALDEHYDE. DUE to hyperconjugation, methyl group in - tolualdchyde is electron releasing because of which the positive charge on carbonyl CARBON decreases. Due to resonance EFFECT (electron withdrawing effect of nitro group ) in p - nitrobenzaldehyde, the positive charge on carbonyl carbon increases . Greater the positive charge on carbonyl carbon. more is the reactivity.

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