Question

Explain hydrogenation with an example.

Answer 1

Hydrogenation:

• A chemical reaction between molecular hydrogen and an element or compound, ordinarily in the presence of a catalyst is called hydrogenation.
• In hydrogenation, hydrogen gets attached to a double or triple bond connecting two atoms in the structure of the molecule.
• Generally, the catalyst used in hydrogenation are $\mathrm{Ni},\mathrm{Pd},\mathrm{Pt}$.
• Hydrogenation is generally carried out at lower temperatures.
• It is used to preserve raw materials or ingredients such as Alcohol, Ammonia, various polymers, etc.
• Hydrogenation is a process used to convert vegetable oil from a liquid to a solid or semi-solid fat.

Example: Hydrogenation of Cyclohexene$\left({\mathrm{C}}_6{\mathrm{H}}_{10}\right)$ to Cyclohexane$\left({\mathrm{C}}_6{\mathrm{H}}_6\right)$

$\underset{\mathrm{Cyclohexene}}{{\mathrm{C}}_6{\mathrm{H}}_{10}}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2}\stackrel{\mathrm{Pd}}{\to }\underset{\mathrm{Cyclohexane}}{{\mathrm{C}}_6{\mathrm{H}}_{12}}$