Question

Complete the equation: \[ CH_3CHO + NH_2NH_2 \xrightarrow{OH^-} \; ? \]

Hint:

Wolff–Kishner reduction converts carbonyl group → methylene (−CH\(_2\)−).

Answer 1

Concept: This is the
Wolff–Kishner reduction. Aldehydes or ketones react with hydrazine in basic medium to give alkanes.
Reaction: \[ R{-}CHO + NH_2NH_2 \xrightarrow{KOH,\ \Delta} R{-}CH_3 + N_2 + H_2O \]
Apply to acetaldehyde: \[ CH_3CHO \xrightarrow{NH_2NH_2/KOH} CH_3CH_3 \]
Product: Ethane