Which of the following does not give aldol condensation reactions?
Correct answer: A. Formaldehyde
- A. Formaldehyde
- B. Acetaldehyde
- C. Dimethyl ketone
- D. Propionaldehyde
Explanation
Formaldehyde does not give aldol condensation reactions. This is because formaldehyde is not a beta-hydroxy aldehyde, which is a requirement for the aldol condensation reaction to occur. It does not have a hydrogen atom on the carbon adjacent to the carbonyl group (the alpha carbon) to donate to the carbonyl group.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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