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Unformatted text preview: rbital Model Main Ideas
Electrons in a molecule occupy molecular
orbitals (MOs) just as electrons in an atom
occupy atomic orbitals (AOs).
Two electrons per MO, just as two electrons
Express MOs as combinations of AOs. MO Picture of Bonding in H2
Linear combination of atomic orbitals method
expresses wave functions of molecular orbitals
as sums and differences of wave functions
of atomic orbitals.
Two AOs yield two MOs
Bonding combination Antibonding combination ψMO = ψ(H)1s + ψ(H')1s ψ'MO = ψ(H)1s - ψ(H')1s
MO Fig. 2.6: Energy-Level Diagram for H2 MOs 1s 1s
AO AO Fig. 2.6: Energy-Level Diagram for H2 MOs
MO antibonding bonding
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- Fall '11