W2013CHM2311 Part 4a Notes

Molecular orbitals mo atomic orbitals 1sa vb theory

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Unformatted text preview: combina?on): Mathema0cally: ψ*MO = caϕ1sA  ­ cbϕ1sB Visually: ϕ1sA ϕ1sB ϕ1sA  ­ϕ1sB ψ*MO = caϕ1sA  ­ cbϕ1sB The MO wave func0on is nega0ve in the shaded region! There is a node in the ψ*MO halfway between the nuclei where cAϕ1sA  ­ cBϕ1sB is equal to zero. Molecular Orbital Theory Quantum theory requires that both the nega0ve and posi0ve combina0ons of atomic orbitals be made. Thus, two atomic orbitals combine to generate two molecular orbitals. Molecular Orbitals (MO) Atomic Orbitals ϕ1sA VB Theory stops here 1 MO ψ*MO = caϕ1sA  ­ cbϕ1sB ϕ1sB 1 MO ψMO = caϕ1sA + cbϕ1sB A molecular orbital is associated with the en0re molecule while the atomic orbital is associated with only one atom. Molecular Orbital Theory Atomic orbitals on different atoms combine to make new molecular orbitals. Molecular Orbitals (MO) Atomic Orbitals ϕ1sA VB Theo...
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This note was uploaded on 03/28/2014 for the course CHM 2311 taught by Professor Richardson during the Winter '09 term at University of Ottawa.

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