Hemiacetals are formed by the reaction of:
Correct answer: A. One molecule of alcohol with an aldehyde
- A. One molecule of alcohol with an aldehyde
- B. Two molecules of alcohol with an aldehyde
- C. One molecule of alcohol with a ketone
- D. Two molecules of alcohol with a ketone
Explanation
A hemiacetal is a functional group that has both a hydroxyl (-OH) group and an alkoxy (-OR) group attached to the same carbon atom. It is formed as an intermediate in the reaction of an aldehyde with one equivalent of an alcohol.
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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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