Question

In Stephen’s reduction, which of the following group is converted into – CHO group?

Answer 1

Explanation:

In Stephens reduction cynaide group (CN) is converted to aldehyde group (CHO).

Answer 2

In Stephen’s reduction, the aldehyde group is prepared with the help of a cyanide group.

Explanation:

• Stephens reduction is a reduction reaction in which aryl or aromatic nitriles are converted into an aldehyde.

• These reactions and conversions take place when they are allowed to react with hydrochloric acid, stannous chloride, and water.$R-C=N ------- R-CHO$

• At first, cyanide reacts with hydrochloric acid to give a salt which then reacts with stannous chloride.
• Then the reduced cyanide is undergone through hydrolysis and finally, it gives aldehyde.