frontier molecular orbital theory

Frontier molecular orbital theory can be used to explain this outcome.

A 2+2 cycloaddition reaction is one example of a pericyclic reaction that can be analyzed using these rules or by the related frontier molecular orbital theory.

The relative orbital size on each atom is represented by orbital coefficients in the Frontier molecular orbital theory (FMO).

In chemistry, frontier molecular orbital theory is an application of MO theory describing HOMO / LUMO interactions.