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Question

The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is


A

The presence of reactive methylene grop in ethyl acetoacetate

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B

The phenomenon of keto enol tautomerism

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C

The presence of at least α - hydrogen atom in ester

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D

All the three factors

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Solution

The correct option is A

The presence of reactive methylene grop in ethyl acetoacetate


The first two steps of Claisen condensation are reversible with the tendency toward reactant and not to P

However, due to reactive methylene group the reaction does not stop all this step but converted into carbanion, which being resonance stabilized favours the reaction more toward right than to left



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