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lect18_ch24c - Isomerism& Crystal Field Theory...

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Unformatted text preview: Isomerism & Crystal Field Theory Isomerism & Crystal Field Theory Chapter 24 – Lecture 3 Chapter 24 – Lecture 3 Chemistry 123 Spring 2008 Dr. Woodward Isomers Isomers Different ligands make bonds to the metal Ligands bond to the metal through different atoms Ligands have different (ligand) neighbors Molecules are non- superimposable mirror images Linkage Isomers Linkage Isomers Geometric Isomers Geometric Isomers Optical Isomers Optical Isomers Intra-atomic (d to d) excitations Intra-atomic (d to d) excitations In these complexes the color comes from absorption of light that leads to excitation of an electron from one d-orbital to a different d-orbital on the same metal cation . CuSO 4 NiSO 4 CoSO 4 FeSO 4 MnSO 4 ZnSO 4 [M(H [M(H 2 O) O) 6 ] n+ n+ Complex ions Complex ions M H 2 O MO MO 6 Octahedron Octahedron d d z z 2 & d & d x x 2-y-y 2 orbitals (e orbitals (e g ) ) • Point directly at the ligands...
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