Question:

What are X and Y respectively in the following set of reactions?

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DIBAL-H stops reduction at the aldehyde stage for nitriles.
Updated On: Jun 3, 2026
  • $H_{2}/cat; (CH_{3})_{2}Cd$
  • $Na/C_{2}H_{5}OH; CH_{3}MgBr, H_{2}O$
  • $DIBAL-H, H_{2}O; CH_{3}MgBr, H_{2}O$
  • $LiAlH_{4}, H_{2}O; (CH_{3})_{2}Cd$
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The Correct Option is C

Solution and Explanation

Step 1: Concept
This reaction sequence involves the reduction of nitriles to aldehydes and the Grignard reaction to form secondary alcohols/ketones.

Step 2: Meaning
$DIBAL-H$ is a selective reducing agent for converting nitriles to aldehydes. Grignard reagent ($CH_{3}MgBr$) reacts with carbonyls.

Step 3: Analysis
$DIBAL-H$ followed by hydrolysis is the standard route for the specific conversion indicated.

Step 4: Conclusion
The reagents are $DIBAL-H$ and $CH_{3}MgBr$.

Final Answer: (C)
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