Question
Identify the product obtained when isopropyl magnesium chloride in dry ether reacts with dry ice forming a complex, hydrolysed further.
MHT CET
Chemistry
Carboxylic Acid Derivatives
2026
MHT CET 2026 (18 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Propanoic acid
- B. Propanal
- C. 2 - Methylpropanoic acid
- D. 2 - Methylpropanol
Answer
C. 2 - Methylpropanoic acid
Step-by-step solution
Isopropyl magnesium chloride is (CH_3)_2CHMgCl. Dry ice is solid CO_2. When a Grignard reagent reacts with dry ice, it undergoes nucleophilic addition to the carbonyl group of CO_2 to form a magnesium carboxylate complex. (CH_3)_2CHMgCl + O=C=O (CH_3)_2CH-COOMgCl Upon acid hydrolysis, the complex yields a carboxylic acid. (CH_3)_2CH-COOMgCl + H_2O (CH_3)_2CH-COOH + Mg(OH)Cl The product (CH_3)_2CH-COOH is 2-methylpropanoic acid. Answer: 2 - Methylpropanoic acid
Related: Chemistry — Carboxylic Acid Derivatives · All PYQ Banks