Acetic acid reacts with thionyl chloride to form acetyl chloride, which species acts as nucleophile in the reaction
Correct answer: B. CI-
- A. SO2
- B. CI-
- C. SO3
- D. No nucleophile is formed
Explanation
Cl- is negatively charged and attacks the carbon which has a slight positive charge in the carboxyl group. It forms an intermediate and the compound gains its stability as a leaving group (-OH in this case) attached to the carbon leaves. The generalmechanism is shown below.
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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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