The intermediate compound ‘X’ in the following chemical reaction is
The intermediate compound ‘X’ in the following chemical reaction is
The Correct Option is B
Solution and Explanation
The given reaction describes the oxidation of a toluene derivative to a benzaldehyde using a reagent known as the Collins reagent, which is chromium(VI) oxide dichloride (CrO2Cl2) in carbon disulfide (CS2) as solvent.
Let's analyze the reaction step by step:
- The starting compound is toluene (methylbenzene). The Collins reagent oxidizes the methyl group directly attached to the aromatic ring to a carbonyl group (aldehyde). The proposed intermediate in this reaction is a complex where the methyl group oxygenates to form a chromate ester intermediate.
- The intermediate compound 'X' in such reactions can be depicted as the chromate ester of toluene before undergoing hydrolysis.
- Finally, hydrolysis of the chromate ester produces benzaldehyde.
Considering the choices given for intermediate 'X', the correct one is as follows because it typically represents a structure where the methyl group has been partially oxidized, possibly forming a chromate ester:
This is the most likely intermediate formed when using the Collins reagent in this oxidation process, as it represents the step where the chromium reagent interacts with the methyl group.
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Concepts Used:
Alcohols, Phenols, and Ethers
Alcohol is formed when a saturated carbon atom bonds to a hydroxyl (-OH) group. It is an organic compound that contains a hydroxyl functional group attached to a carbon atom.
Phenol is formed when the -OH group replaces the hydrogen atom in benzene. It is an organic compound in which a hydroxyl group directly attaches to an aromatic hydrocarbon.
Ether is formed when oxygen atom bonds to two alkyl or aryl groups. It is an organic compound that has an oxygen atom that is connected to two aryl and alkyl groups.
Read More: Alcohol, Phenol, and Ethers