Which one of the following reacts with Grignard reagent to form an addition product which can be hydrolysed to a carboxylic acid?
Show Hint
- \( O_2 \)
- \( CO_2 \)
- \( SO_2 \)
- None of these
The Correct Option is B
Solution and Explanation
Grignard reagents (\(R-MgX\)) act as strong nucleophiles. They react with various electrophiles to form new carbon-carbon bonds.
Step 2: Detailed Explanation:
When a Grignard reagent reacts with carbon dioxide (\(CO_2\)), it forms a carboxylate salt. This salt upon acid hydrolysis yields a carboxylic acid. \[ R-MgX + O=C=O \rightarrow R-COO^- MgX^+ \xrightarrow{H_3O^+} R-COOH + MgX^+ \] Other options like \(O_2\) or \(SO_2\) give different products like alcohols or sulfinic acids.
Step 3: Final Answer:
Thus, the correct answer is (B) \(CO_2\).
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