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प्रश्न
Write Stephen reaction for the preparation of aldehyde.
टीपा लिहा
उत्तर
Nitriles are reduced to imine hydrochloride by stannous chloride in the presence of hydrochloric acid which on acid hydrolysis gives corresponding aldehydes. This reaction is called Stephen reaction.
\[\ce{\underset{(Nitrile)}{R - C ≡ N}+ 2[H] ->[SnCl2,HCl] \underset{(lmmine hydrochloride)}{R - C ≡ N·HCl} ->[H+][H3O+] \underset{(Aldehyde)}{R - CHO} + NH4Cl}\]
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