The alpha-hydrogen atom attached to the carbonyl group is acidic in nature because the carbanion which is left gets resonance stabilished. As a result, these compounds take part in the aldol condensation reactions. The carbanion acts as a nucleophile in these reactions. The compounds in which alpha-hydrogen is not acidic take part in the Cannizzaro's reaction. In this reaction, one molecule of the carbonyl compound under consideration is reduced to primary alcohol while the other is oxidised simutaneously to the carboxylic acid. A mixture of cinnamaldehyde and crotonaldehyde is treated with concentrated alkali. C_(6)H_(5)overset(beta)(C)H=overset(alpha)(C)HCHO+overset(gamma)(C)H_(3)overset(beta)(C)H=overset(alpha)(C)HCHOoverset(OH^(-))rarr Which statement is true about the above reaction ?

The alpha-hydrogen atom attached to the carbonyl group is acidic in na

1.	The alpha-hydrogen atom attached to the carbonyl group is acidic in nature because the carbanion which is left gets resonance stabilished. As a result, these compounds take part in the aldol condensation reactions. The carbanion acts as a nucleophile in these reactions. The compounds in which alpha-hydrogen is not acidic take part in the Cannizzaro's reaction. In this reaction, one molecule of the carbonyl compound under consideration is reduced to primary alcohol while the other is oxidised simutaneously to the carboxylic acid. A mixture of cinnamaldehyde and crotonaldehyde is treated with concentrated alkali. C_(6)H_(5)overset(beta)(C)H=overset(alpha)(C)HCHO+overset(gamma)(C)H_(3)overset(beta)(C)H=overset(alpha)(C)HCHOoverset(OH^(-))rarr Which statement is true about the above reaction ?
Answer» Aldol condensation takes place and `alpha`-carbon atom of crotonaldehyde provides the CARBANION Aldol condensatin takesplace and `beta`-carbon atom of crotonaldehyde provides the carbanion Aldol condensation takes place and `gamma`-carbon atom of crotonaldehyde provides the carbanion Aldol condensation takes place and `alpha`-carbon and cinnamicaldehyde provides the carbanion. Solution :Removal of `gamma`-hydrogen of crotonaldehyde provides more STABLE allylic carbanion. Hene `gamma`-carbon (not `alpha`) provides the carbinion (NUCLEOPHILIC) for the carbonyl carbon of CINNAMALDEHYDE