ORGANIC CHEMISTRY Chapter 13 13. 7c Molecular Orbitals of 1,3-Butadiene Y4 00-V3 LUMO 4444 y2 HOMO °HoMo—( hihgest occupied molecular orbital) o LUMO-( lowest unoccupied molecular orbital Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 13 13.7C Molecular Orbitals of 1,3-Butadiene ψ1 ψ2 ψ3 ψ4 HOMO LUMO HOMO——(hihgest occupied molecular orbital) LUMO——( lowest unoccupied molecular orbital)