Question

In the following reaction
$ CH_3CHO + NH_2 \cdot NH_2 \rightarrow A \xrightarrow{B} CH_3 CH_3 + N_2$
Identify $A$ and $B$.

• A. $CH _{3} CH = NNH _{2}$ and $C _{2} H _{5} ONa$
• B. $CH _{3} CH _{2}- NH _{2}$ and $C _{2} H _{5} ONa$
• C. $CH _{3}- NH - NH - CH _{3}$ and $C _{2} H _{5} OH$
• D. $CH _{3} CH _{2} NH _{2}$ and $C _{2} H _{5} OH$

Answer 1

Answer: (A)

Aldehydes can be reduced to alkanes with hydrazine and $C _{2} H _{5} ONa$ at $150-200^{\circ} C$. This reaction is known as Wolf-Kishner reduction.
$CH _{3} CHO + NH _{2} \cdot NH _{2} \longrightarrow CH _{3} CH = NNH _{2}$