Question

What is the IUPAC name of the organic compound formed in the following chemical reaction? 

• A. 2-methyl butan-2-ol
• B. 2-methyl propan-2-ol
• C. pentan-2-ol
• D. pentan-3-ol

Answer 1

The Correct Option is C

The given reaction is a Grignard reaction with acetone. Let's analyze step by step to find the IUPAC name of the organic compound formed.

1. The reactant is acetone, which is a ketone with the structure: \(CH_3COCH_3\).
2. The Grignard reagent used is ethylmagnesium bromide (\(C_2H_5MgBr\)). It will attack the carbonyl carbon of acetone.
3. After the nucleophilic addition of the ethyl group (\(C_2H_5\)) to the carbonyl carbon, the intermediate formed is converted into the alcohol after the addition of water and acid (\(H_2O, H^+\)).
4. This leads to the formation of the tertiary alcohol: \(CH_3CH(OH)C_2H_5CH_3\).
5. This compound is known as pentan-2-ol.

Thus, the IUPAC name of the compound formed in the reaction is pentan-2-ol.

Correct Answer: pentan-2-ol