Keywords: Butadiene-pi-MOs-Spartan-3D-balls.png Energy level diagram of the Ï molecular orbitals of butadiene forced to adopt a planar cis conformation for the purposes of discussing cycloadditions Structures calculated and images produced using HF/6-31G in http //www wavefun com/products/macintosh/Student/mac_student html Spartan '04 Student Edition and http //www cambridgesoft com/software/details/ ds 2 dsv 73 ChemDraw Ultra 11 0 Energy of orbitals Ï <sub>4</sub> +7 71713 eV<br> Ï <sub>3</sub> +3 16186 eV LUMO <br> Ï <sub>2</sub> ˆ’8 66624 eV HOMO <br> Ï <sub>1</sub> ˆ’12 10962 eV Own 2009-01-26 Ben Mills Benjah-bmm27 Images by Ben Mills Butadiene molecular orbitals |