1Color and Bonding in Transition Metal Complexes Transition Metal Complexes Chemistry 123Chemistry 123Dr. Patrick WoodwardDr. Patrick WoodwardSupplemental Lecture 3 Supplemental Lecture 3 IntraIntra-atomic (localized) excitationsatomic (localized) excitations–Transition metal ions, complex ions & compounds (d-orbitals)–Lanthanide ions and compounds (f-orbitals)[Ni(NH3)6]2+NiSO4Cu3(CO3)2(OH)2MalachiteCuSO4In these complexes the color comes from absorption of light that leads to excitionof an electron from an occupied d-orbital to an empty or ½-filled d-orbital. The energy separation between d-orbitals depends upon the interaction between the d-orbitals and the ligands. There are two ways to rationalize the energy separation Crystal Field Theory& Ligand Field Theory.
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