Question

Oxidation of toluene to benzaldehyde by chromyl chloride is called

(a) Friedel-Craft reaction 

(b) Wurtz reaction 

(c) Cannizzaro reaction 

(d) Etard reaction

Answer 1

(d) Etard reaction

The oxidation of toluene (C_6​H₅​CH₃​ with chromyl chloride (CRO₂​Cl₂​) in CCl₄​ or CS₂​ 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 (C₆​H₅​CHO).