in-a-molecular-orbital-diagram-of-butadiene-which-orbital-does-an-electron-move-

Question

In a molecular orbital diagram of butadiene, which orbital does an electron move to upon UV irradiation?

Accepted Answer

From a bonding π orbital to an antibonding π* orbital.

Answer

From a σ orbital to a π orbital.

Answer

From an antibonding π* orbital to a bonding π orbital.

Answer

From a non-bonding orbital to a bonding orbital.