Rep:Mod:Gcf14tsjmole

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Jmol 1: Illustration of the vibration in the transition state for the reaction between butadiene and ethylene

Molecular Orbitals associated with Diels-Alder reaction between cyclohexadiene and 1,3-dioxole

Endo transition state lower energy occupied orbital	Endo transition state HOMO	Endo transition state LUMO	Endo transition state higher energy unoccupied orbital
Exo transition state lower energy occupied orbital	Exo transition state HOMO	Exo transition state LUMO	Exo transition state higher energy unoccupied orbital