Chemistry - Hydrocarbon Question with Solution | TestHub

Question Explanation: Cyclohex-3-enone is treated with ${\mathrm{N}}_2{\mathrm{H}}_4/{\mathrm{H}}_2{\mathrm{O}}_2$. We must identify the product formed.

Concept :

This question is based on Transfer hydrogenation, Selective reduction of ene bond , Chemoselectivity

Solution :

The reagent system N₂H₄ / H₂O₂ acts as a transfer hydrogenation system.

Hydrazine (N₂H₄ ) is the reducing agent.

It reduces the ene (C=C) bond not C=O bond.