Question

The organometallic compound (CH₃)₃CMgBr on reaction with D₂O produces

• A. (CD₃)₃CD
• B. (CD₃)₃COD
• C. (CH₃)₃CD
• D. (CH₃)₃COD

Hint:

In reactions involving Grignard reagents, the carbon atom bonded to magnesium attacks the proton in water or D₂O, leading to the formation of an alkane. If D₂O is used, the hydrogen is replaced by deuterium.

Answer 1

The Correct Option is C

The given compound is an organomagnesium halide, specifically Grignard reagent \(\text{(CH}_3\text{)}_3\text{CMgBr}\), which reacts with deuterium oxide (D₂O). The Grignard reagent acts as a nucleophile and attacks the proton (H⁺) in D₂O, where the hydrogen atom (H) is replaced by the deuterium atom (D). In this case, the Grignard reagent's carbon atom (C) attaches to the deuterium (D), forming the product (CH₃)₃CD, where the hydrogen is replaced by deuterium, thus creating a deuterated alkane.
Thus, the correct answer is: \[ \text{The product is} \, (CH₃)_3CD. \]