Hydrogenation allows us to determine how many degrees of unsaturation are due to π bonds.
Hydrogenation is a chemical reaction between molecular hydrogen and other compound in the presence of catalyst.
Chemical Reaction example of Hydrogenation,
C2H4 + H2 ⇄ C2H6,
In above example, ethene reacts with hydrogen to produce ethane, in the presence of Nickel Catalyst.
Also, What are π bonds?
π bonds are the chemical bonds that are covalent in nature which form bonds between two neighboring atom's unbonded p - orbitals.
For example,
Ethylene molecule contain 5 sigma bonding and 1 pi bonding in it.
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