Question

To show n to Pi* transition by
absorbing UV radiation, molecule must
have​

Answer 1

Explanation:

That means that in order to absorb light in the region from 200 - 800 nm (which is where the spectra are measured), the molecule must contain either pi bonds or atoms with non-bonding orbitals. Remember that a non-bonding orbital is a lone pair on, say, oxygen, nitrogen or a halogen.

Answer 2

To show n to Pi* transition by absorbing UV radiation, the molecule must contain pi electrons.

Explanation:

• In UV visible region :-
• Electronic transitions take place for some molecules
• Molecules will absorb light strongly in the UV region and they are called chromophores.
• Chromophores are the functional groups of a molecule that absorb light in the Uv visible region of the electromagnetic spectrum.
• These chromophores are characterized by delocalised pi electrons.
• Pi electrons is a type of bond which occurs in electron orbitals are known as pi orbitals.