lect19_ch24d_3pg

lect19_ch24d_3pg - Bonding in Transition Metal Complexes...

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1 Bonding in Transition Metal Bonding in Transition Metal Complexes Chemistry 123 Spring 2008 Dr. Woodward Orbital Energies in Multielectron Atoms Energy 1 s 2 s 2 p 3 s 3 p 3 d n = 1 n = 2 n = 3 n = 0 1 s 2 p 3 d 2 s 3 p 3 s 4 p 4 s Single Electron Atom Multi-Electron Atom Orbital Energies in Transition Metals Orbital Energies in Transition Metals 1 s 2 p 3 d 2 s 3 p 3 s 4 p 4 s For a (1 st row) transition metal, like Cr, the 4s, 3d and 4p orbitals are the valence orbitals. These are the orbitals of interest. The electron configuration of an isolated Cr atom is [Ar]4s 1 3d 10 What happens when we bring ligands into the picture?
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2 Two Ligands Linear Geometry Linear Geometry 4 s 3 d xz 3 d xy 3 d x2-y2 3 d z2 3 d yz 4 p x 4 p z 4 p y 4 s Energy = Ligand = Metal Isolated Metal Atom Cu [Ar]4s 1 3d 10 CuL 2 + Complex Cu [Ar]3d 10 4 p z 4 p x 4 p y 3 d xy 3 d x2-y2 3 d xz 3 d yz 3 d z2 Four Four Ligands Ligands Square Planar Geometry Square Planar Geometry 4 s 3 d xz 3 d xy 3 d x2-y2 3 d z2 3 d yz 4 p x 4 p z 4 p y 4 s 3
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This note was uploaded on 06/03/2011 for the course CHM 123 taught by Professor Woodward during the Spring '08 term at Ohio State.

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lect19_ch24d_3pg - Bonding in Transition Metal Complexes...

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