This activity is meant to teach students about the types of homogeneous transition metal C-H bond functionalization catalysts. Before class, the students will read a short discussion of inner- and outer-sphere C-H bond functionalization catalysts. Then they will use their knowledge of transition metal oxidation states and ligands in order to assess whether a variety of catalysts react via inner- or outer-sphere pathways. Based on what they know about these catalysts, they will also decide whether or not the selectivity of these catalysts is mainly dictated by the C-H bond strengths of the substrates.
A student should be able to predict
- available oxidation states for metals in a variety of complexes.
- whether a catalyst will undergo one- or two-electron chemistry based on the metal's available oxidation states.
- ligands that will likely directly react with a C-H bond.
- whether or not there are any open coordination sites around a metal center.
- whether a C-H bond functionalization catalyst will react via an inner- or outer-sphere pathway.
- whether the selectivity of a C-H bond functionalization catalyst will be mainly dictated by the C-H bond strengths
in the substrates.
I have not yet attempted to implement this learning object. It is meant for an organometallic or advanced inorganic class.
Student learning will be assessed by how well they analyze the last few problems during the in-class discussion. Similar questions will also be included in tests and quizzes.