Question

Acetone reacts with Grignard reagent to form:

• A. $3^{°}\mathrm{alcohol}$
• B. $2°\mathrm{alcohol}$
• C. Ether
• D. No reaction

Answer 1

The correct option is A

$3^{°}\mathrm{alcohol}$

The explanation for the correct explanation:

option (A):

• The reaction between Grignard reagent and ketone produces tertiary alcohol as a product.
• The reaction is carried out in a single step and involves the formation of a six-membered transition state, which is formed when the Grignard reagent attacks the carbonyl centre of the ketone.

The explanation for the incorrect explanation:

option (B): Reacting a Grignard reagent with an aldehyde gives secondary alcohol.

option (C): A primary alcohol is synthesized by reacting the Grignard reagent, R′─MgX, with formaldehyde.

• Ether is an aprotic solvent.
• Ether is a great solvating agent.

option (D): A primary alcohol is synthesized by reacting the Grignard reagent with formaldehyde.

Therefore, the correct option is (A) that is, acetone reacts with Grignard reagent to form $3°\mathrm{alcohol}$.