(Solved): 5. Use a molecular orbital diagram to explain why 1,3-cyclobutadiene is anfiaromatic whereas benzen ...

5. Use a molecular orbital diagram to explain why 1,3-cyclobutadiene is anfiaromatic whereas benzene is aromatic. 6. Why is $$1,3,5,7$$-cyclooctatetraene neither aromatic nor antiaromatic? 7. Label the following aromatic compounds as ortho-, meta-, or para-substituted. Section B. Apply your knowledge. 1. Construct an MO energy diagram for the following molecules, and label HOMO and LUMO. As a reminder, you are expected to be able to predict the number of nodes for each of the energy levels. You do not need to draw the orbitals and or their phasing-