The energy level diagram for MOs General Chemistry: Chapter 12Slide 35 of 47 The AOs are on the left and right (yellow and blue), the MOs are in the center (orage and green). MO labels are and for bonding * and * for antbonding.
Inversion of the MO energies between N 2 and O 2 General Chemistry: Chapter 12Slide 36 of 47 For diatomic molecules with 7 Z the 2p orbital energy is above 2p molecular orbital energy. The latter is filled first.
General Chemistry: Chapter 12Slide 37 of 47 MO Diagrams of 2 nd Period Diatomics C 2 electron configuration:
General Chemistry: Chapter 12Slide 39 of Delocalized Electrons
General Chemistry: Chapter 12Slide 40 of 47 Benzene: delocalized bonding Delocalized bonding is not localized between two atoms: instead, each link has a 'fractional double bond order’. There is a corresponding 'delocalization energy', identifiable with the stabilization of the system compared with a hypothetical alternative in which formal (localized) single and double bonds are present. Bond order = 1.5 Delocalization energy = –263.7 kJ mol -1