Grignard S Reagents And Their Uses

Step 1: Identifying the Type of Alkyl Bromide
- The hydrolysis follows first-order kinetics, which suggests an S mechanism.
- S reactions occur faster for tertiary > secondary > primary alkyl halides.
- Hence, X must be a tertiary alkyl bromide. Step 2: Formation of Grignard Reagent
- When X (tert-butyl bromide) is reacted with Mg in dry ether, a Grignard reagent is formed: Step 3: Reaction with D O
- Grignard reagents act as strong nucleophiles and react with D O to give a deuterated product: Step 4: Identifying the Product (Y)
- The final product (Y) is tert-butyl deuteride.
- The correct option corresponds to the tert-butyl group with deuterium (D) replacing hydrogen.
Thus, the correct answer is option (4). \bigskip