Formaldehyde give and addition product with methyl magnesium iodide. Which one aqueous hydrolysis gives:
Correct answer: B. C2H5OH
- A. CH3OH
- B. C2H5OH
- C. (CH3)2CHOH
- D. ....
Explanation
When a Grignard reagent reacts with aldehydes and ketones, it results in production of addition products which on hydrolysis gives primary, secondary and tertiary alcohol. The reaction is carried in presence of ether followed by H3O+. 1. When Grignard reagent reacts with methanal, it results in production of primary alcohol. 2. When Grignard reagent reacts with ethanal, it results in production of secondary alcohol. 3. When Grignard reagent reacts with ketone, it results in production of tertiary alcohol.
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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.
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