Learning Objectives: Going into this exercise:
- Students should be able to determine the oxidation state and d electron count for a given set of metal complexes.
- Based on the d electron configuration of a metal ion, students should be able to propose whether that metal ion should prefer a tetrahedral or a square planar geometry for a 4 coordinate complex.
- Students should have been introduced to the Jahn-Teller distortion.
Following the Presentation/Discussion:
- Students should be introduced to the concept that there are ligands that will force (or less successfully distort while trying to force) tetrahedral geometry on metals ions with d electron configurations that prefer to have a different geometry.
- Students should be introduced to the concept that by favoring one geometry over another, one oxidation state of a metal can be preferred over another for a given metal.
- Students will be introduced to one application of how ligands of this type can be used to facilitate experiments that probe the chemistry of certain metalloproteins.