W2013CHM2311 Part 4a Notes

A node between nuclei decreases stability of an

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Unformatted text preview: of different atoms interact. Constructive Interference 2.5 2 1.5 1 0.5 0 -0.5 -1 -1.5 -2 -2.5 Construc0ve interference increases the wave amplitude Thinking of Orbitals as Waves Linear combina0ons of atomic orbitals can be visualized as construc0ve and destruc0ve interference that occurs when atomic orbitals (wave func0ons) of different atoms interact. Destructive Interference 1.5 1 0.5 0 -0.5 -1 -1.5 Complete destruc0ve interference results in a wave amplitude of zero Molecular Orbitals & LCAO Destruc0ve Interference Atomic Orbitals ϕ1sA ψ*MO = caϕ1sA  ­ cbϕ1sB ϕ1sB Construc0ve Interference ψMO = caϕ1sA + cbϕ1sB Molecular Orbitals & LCAO AnBbonding MOs: These have decreased electron density in the region between the atoms and a higher energy than the star0ng atomic orbitals. Bonding MOs: These have increased electron density between the two atoms and a low...
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