Lecture 15 - Coordination Bonding Theory Chem 172 Advanced...

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1 Chem 172 Advanced Inorganic Chemistry Lecture 15/May 3 rd Coordination Bond Theory Coordination Bonding Theory Any successful bonding theory must be able explain and predict some basic experimental observations. ± Magnetic susceptibility (unpaired electrons) ± Electronic spectra (optical transition/color) ± Geometry, structure ± Thermodynamic stability Valence Bond Theory Hybridization concept to account for complex geometry and magnetic properties (unpaired electrons), but not electronic spectra. Crystal Field Theory ± Crystal Field Theory was originally developed to describe the electronic structure of metal ions in a crystal, where they electrostatic interact with surrounding anions of certain symmetry defined by the crystal structure. ± Adapted to coordination complexes, it can be used to understand, interpret and predict the magneticm optical (color) and thermodynamic properties of of coordination complexes. ± The crystal field model concentrates on the splitting of the d orbitals of the transition metal atom into groups as a result of electrostatic interactions between the ligands and
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Lecture 15 - Coordination Bonding Theory Chem 172 Advanced...

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