Acetone reacts with HCN to form a cyanohydrin. It is an example of
Correct answer: C. nucleophilic addition
- A. electrophillic addition
- B. electrophilic substitution
- C. nucleophilic addition
- D. nucleophilic substitution
Explanation
In this reaction, the cyanide ion (CN-) acts as a nucleophile. This means it is electron-rich and seeks to attack an electron-deficient center.The carbonyl carbon of acetone, due to its partial positive charge, acts as the electrophilic center. The double bond between carbon and oxygen polarizes, creating a slightly positive carbon susceptible to nucleophilic attack.The cyanide ion attacks the carbonyl carbon in a nucleophilic addition reaction, forming a cyanohydrin molecule.
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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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