W2013CHM2311 Part 4a Notes

2 energies of atomic orbitals when there is a

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Unformatted text preview: finiBon): Any orbital that is an0symmetric with respect to C2 rota0on about the line connec0ng the nuclei is called a pi (π) orbital. ↳  i.e., upon C2 rota0on of the orbitals around the z ­axis, the sign of the orbital wave func0on changes. Examples of π ­orbitals: z z z z Symmetry of Molecular Orbitals What about the difference between bonding and anBbonding orbitals? An0bonding orbitals, σ* and π*, all exhibit a nodal plane that is perpendicular to the internuclear axis. Bonding orbitals do not have a node between the two nuclei. z z z z z z z z σ vs. π Molecular Orbitals In σ-orbitals, there is a high electron density along the internuclear axis. In π ­orbitals, there is no electron density on the internuclear axis. The electron clouds are above and below the internuclear axis. Symmetry of Molecular Orbitals Molecular orbitals are omen labeled with a subscript of g or u to reflect s...
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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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