In which of the following substrates, rate of Benzoin condensation wil

1.	In which of the following substrates, rate of Benzoin condensation will be maximum?
Answer» Solution : Benzoin condensation is due to STABILITY of intermediate (III) when negative charge on C is extensively delocalised in benzenne ring , NITRO and -`C^(@)` N group. INALL other cases, such dispersal is nor extensively possible . On theother hand, `NO_(2)-`is also creating a positive charge center on CARBONYL carbon, making it more susceptible to nucleophilic attack of `CN^(-)`.

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