What is the product when an aldehyde reacts with an alcohol in the presence of dry HCl gas?
Correct answer: A. Acetal
- A. Acetal
- B. Ketal
- C. Ether
- D. Ester
Explanation
In the presence of an acid catalyst, an aldehyde reacts with two equivalents of an alcohol. The first addition forms a hemiacetal, which then reacts with a second molecule of the alcohol to form a stable acetal and a molecule of water.
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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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