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lecture 9 - For a simple diatomic molecule AB in order to...

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Atom A (4 AO s) Atom B (4 AO s) + Molecule A–B (8 MO s) For a simple diatomic molecule A B , in order to overlap……... AO s must have: identical symmetries similar energies What if there are more than two atoms in the molecule?
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Central Atom A (4 AO s) Atoms B, C, D or more (4 LGO s) + Molecule A–B (8 MO s) Combine the orbitals of the non-central atoms into ligand group orbitals Mixing orbitals must have: identical symmetries similar energies
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Strategy for creating an MO diagram for more complicated molecules Determine symmetry of molecule and locate its character table Assign symmetry labels (i.e. Mulliken symbols) of the central atom s orbitals by determining how each orbital transforms with each symmetry operation
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Strategy for creating an MO diagram for more complicated molecules Determine symmetry of molecule and locate its character table Assign symmetry labels (i.e. Mulliken symbols) to the central atom s orbitals by determining how each
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