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Why are aldehydes more reactive than ketones? |
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Answer» Solution :ALDEHYDES are more reactive than ketones due to the following TWO reasons: (i) Due to smaller +I-effect of one ALKYL group in aldehdyes as compared to larger +I-effect of two alkyl groups, the magnitude of positive charge on the carbonyl carbon is more in aldehydes than in ketones. As a result, nucleophilic addition reactions occur more READILY in aldehydes than in ketones. (ii) Due to presence of a H-atom on the carbonyl group, aldehydes can be more easily oxidised than ketones. As a result, aldehydes act as reducing agents and thus reduce TOLLEN' reagent, fehling's solution, etc. |
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