W2013CHM2311 Part 4a Notes

Overlap for the px and py orbitals to give is less and

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Unformatted text preview: s 2) Electrons go in lowest energy MOs first. For a stable molecule, the number of electrons in bonding MOs is greater than the number of electrons in an0bonding MOs. •  Each MO can contain two electrons. •  When electrons are added to MOs of the same energy, the most stable arrangement is predicted by Hund’s rule. •  The number of electrons in the MOs is equal to the sum of all of the electrons in the bonding atoms. MO Energy Level Diagrams Relative Energies of Molecular Orbitals controlled by three factors: 1. Symmetry of the AO – must have correct symmetry to overlap The symmetry of the atomic orbitals is obviously important when these orbitals interact. Interactions between orbitals can be “constructive”, “destructive” or “zero”. MO Energy Level Diagrams Relative Energies of Molecular Orbitals controlled by three factors: 1. Symmetry of the AO – must have correct symmetry to overlap The s...
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