(CH3)3CMgCl A. A is:
Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.
Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA
This is a Grignard reagent hydrolysis reaction with heavy water (D₂O). Grignard reagents (RMgX) react with water or D₂O to form hydrocarbons by replacing the MgX group with H or D. The reaction mechanism involves nucleophilic attack by deuterium from D₂O on the carbon attached to magnesium.
For (CH₃)₃CMgCl, the carbon attached to Mg is tertiary. When it reacts with D₂O, the MgCl group is replaced by a deuterium (D) atom. The methyl groups (CH₃) do not contain Mg and are therefore not affected. No H/D exchange occurs on the alkyl group; only the carbon bonded to Mg gets deuterated.
Therefore, the product A is (CH₃)₃CD.
Final Answer: (CH3)3CD