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In the reaction sequence shown below: Toluene KMnO4 A SOCl2 B H2/Pd, BaSO4 C what is the final compound C?

1. C6H5CH2OH
2. C6H5CHO
3. C6H5COOH
4. C6H5CH3

Correct answer: C6H5CHO

Solution

The reaction sequence involves the oxidation of toluene to form benzaldehyde (C6H5CHO) using KMnO4, followed by conversion of the resulting carboxylic acid to an acyl chloride with SOCl2, and finally, the reduction step does not affect the aldehyde, confirming that C is benzaldehyde.

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