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  4. The oxidation of toluene to benzaldehyde by chromyl chloride is called

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Q. The oxidation of toluene to benzaldehyde by chromyl chloride is called

Aldehydes Ketones and Carboxylic Acids

Solution:

The oxidation of toluene $\left( C _{6} H _{5} CH _{3}\right.$ with chromyl chloride $\left( CRO _{2} Cl _{2}\right)$ in $CCl _{4}$ or $CS _{2}$ to give benzaldehyde is called Etard reaction. In this reaction, the chromyl chloride first forms a brown complex, which is seperated and then decomposed with $H _{2} O$ to give benzaldehyde