I wanted my organometallic class to explore the bonding and spectroscopy of the Kubas dihydrogen complex without having to spend the time doing the entire literature discussion (which is really great and I have done it many times in the past) because I wanted to do it in only about 20-30 minutes in a 75 minute class period. Most of the questions come from the Kubas literature discussion, which I shortened. The IR and reduced mass calculations come from an LO I wrote about arene activation by Jones and Feher.
This is an in class activity that I just used to replace a lecture! After students have the basic ideas of how to perform symmetry operations and put molecules in point groups, I like to reflect on the idea of a 'mathematical group' and what that means in terms of symmetry and group theory in inorganic chemistry.
I saw Amanda Cook present this work (and another paper, Organometallics, 2022, 41, 997) at the Organometallics Gordon Conference in summer 2023 and while I was furiously taking notes, I knew that I wanted to teach this paper. The paper elucidates the mechanism of oxidative addition of tertiary silanes to palladium zero phosphine complexes.
This POGIL based activity is intended to review general chemistry concepts of atomic structure and to further those concepts with additional attention to d orbitals and radial distribution graphs. The primary model in the activity is The Orbitron website (https://winter.group.shef.ac.uk/orbitron/) with students examining the isosurface and radial distributions for a variety of orbitals.
The second in a series on teaching advanced topics to undergraduates, the SLiThEr focuses on organoMetallic chemistry. While the primary framework for the discussion is my senior level course, there is plenty of great content from the live participants.
In Fall 2022, R. David Britt was awarded the ACS Alfred Bader Award in Bioinorganic Chemistry for pioneering pulse electron paramagnetic resonance (EPR) spectroscopy of the photosystem II oxygen-evolving complex, plus the advanced EPR spectroscopic characterization of numerous and varied key metalloenzymes and catalysts.
Joanna Aizenberg of Harvard University was awarded the 2023 ACS Award in Colloid Chemistry for her outstanding contributions to fundamental and applied colloid chemistry in developing large-scale, highly ordered porous colloidal materials with unique photonic, catalytic, and sensing properties. This literature discussion will highlight her recent work to understand how colloidal crystals of polystyrene spheres grow when the solvent evaporates.
My advanced inorganic students often have trouble conceptualizing microstates and term symbols. This exercise is intended to provide a hands-on assembly of microstate models and their combination to form term symbols.
This paper describes the use of a catalytic nickel system for the hydrodefluorination of aryl amides. While organofluorine compounds are extremely useful because of their unique properties, there are growing concerns about the impact of these compounds on the environment. Carbon-fluorine bonds are extremely strong, and so getting them to react is a significant challenge for chemists.
This literature discussion is based on a 2022 Science paper describing a series of dilanthanide complexes with exceptional magnetic properties due to the presence of metal-metal bonding. These molecules are the first reported species to feature direct bonding between two lanthanides! The paper contains ample material for discussion of molecular symmetry and bonding, oxidation states and electron configurations, and magnetism. The handout includes a description, glossary, discussion questions, and pre-class worksheet.