Question:medium
The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is
The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is
Updated On: Mar 20, 2026
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The Correct Option is A
Solution and Explanation
To convert benzoic acid to benzaldehyde in one step, we need a specific reducing agent that selectively reduces the carboxylic acid group to an aldehyde group without further reduction to an alcohol. The reagent needed for this transformation is di-isobutylaluminum hydride (DIBAL-H).
DIBAL-H selectively reduces esters, nitriles, and carboxylic acids to aldehydes at low temperatures.
- Mechanism: When DIBAL-H is used in controlled conditions, it adds to the carbonyl group of the carboxylic acid, forming an intermediate that can be hydrolyzed to yield the aldehyde.
- Conclusion: Therefore, DIBAL-H is the appropriate reagent for converting benzoic acid to benzaldehyde in a single step.
Other options do not provide this selective reduction without further reducing benzaldehyde to benzyl alcohol.
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