Compound X reacts with Grignard's reagent to produce tertiary alcohols. What is the compound?
Correct answer: B. Ketone
- A. Aldehyde
- B. Ketone
- C. Acid halide
- D. Carboxylic acid
Explanation
Grignard's reagent (RMgX) reacts with ketones to produce tertiary alcohols. The reaction involves the nucleophilic addition of the Grignard reagent to the carbonyl group of the ketone, followed by hydrolysis to form a tertiary alcohol.The reaction is:R2C=O (ketone) + RMgX (Grignard reagent) → R2C(OH)R' (tertiary alcohol)
This question appeared on the KMU MDCAT 2023 (retake) paper, which you can sit online with every answer explained.
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About Nucleophilic Addition Reactions
Nucleophilic addition occurs at the polar carbonyl group of aldehydes and ketones, where a nucleophile attacks the electron-deficient carbon atom. Reactions with hydrogen cyanide, sodium bisulfite, alcohols and Grignard reagents are explained through tetrahedral intermediates, acid or base catalysis, and the different reactivity of aldehydes and ketones.
Practise Aldehydes and Ketones
679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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