Reading: CHP 5 Molecular Orbitals - Homonuclear diatomics: 5.2


  • PreQuiz on reading
    1. Please bring to class drawings of the all the MOs orbitals that can be formed from interactions between
      • 2 p orbitals
      • Label your orbitals as bonding and anti-bonding
    2. Draw one example of an orbital that can be formed by an interaction between two d-orbitals
    3. Draw Lewis structures of O2+, O2, and O2-

  • Video: Drawing an MO Diagram for Homonuclear Diatomics O2 and F2

Learning Outcomes:

This section continues on the discussion of MOs for homonuclear molecules. It expands the discussion by introducing mixing of orbitals thus allowing for representation of more diatomics.

  • be able to produce MO diagrams for homonuclear diatomics, particularly second row elements
  • use MO diagrams to calculate bond order and multiplicity
  • identify the LUMO and HOMO in the diagram
  • use the diagrams to rationalize the relative stability of diatomics

Group Activity - We will discussing figures 5.5 - 5.8 in detail. Be prepared to discuss the figures in groups.

Problem Set (4th Ed): 5.2, 5.4, 5.3(a,b), 5.5, 5.6 (solutions)

Problem Set (5th Ed): 5.2, 5.4, 5.3(a,b), 5.5, 5.6 (solutions)

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