These Learning Objects were used in an advanced undergraduate chemistry course that used computational chemistry as an integrative tool to help students deepen their understanding of structure, bonding, and reactivity and practice their integrative expertise by addressing complex problems in the literature and in their own research.
All chemistry is learned best by "doing," and I believe this is especially true for determining molecular symmetry. This activity was designed to end a three-part lecture/activity on symmetry and point groups for my advanced inorganic class. I call this unit on symmetry a lecture/activity series because it was designed to be student-guided learning and requires the students to teach each other how to determine a molecular point group. I only gave one formal lecture on symmetry and point groups, which was followed by the symmetry scavenger hunt activity LO. Finally this assignment was do
We have prepared a YouTube video demonstrating a visually accessible kinetic isotope effect in the Cr(VI) oxidation process, a reaction commonly encountered in introductory organic chemistry. The demo provides students with an opportunity to see an isotope effect and then understand how it can be used to provide mechanistic evidence for the identification of a rate-determining reaction step.
My first computational collection
In this activity, students construct molecular orbital correlation diagrams for several species (H2, He2, HeH), in a semi-quantitative fashion using a ruler and a list of first ionization energies. All the MO schema are placed on a common energy scale, and the stability of each orbital is reported using "cm from the top of the paper" as the unit of energy.
In this paper by Andersen and Berg (J. Am. Chem. Soc., 1988, 110 (14), pp 4849–4850) the authors present magnetic measurements that refute the calculated ground state of an organometallic cobalt nitrosyl dimer. Students will learn about two physical techniques for measuring magnetism and will learn how magnetic measurements can be used to indicate paramagnetism versus diamagnetism.
This is a literature-based activity that focuses on a review I recently published as part of a thematic series on C-H activation.
The review highlights similarities between the newly discovered frustrated Lewis pairs and polarized metal-ligand multiple bonds. There are many ways to use the review, but the attached set of questions focuses on drawing analogies among seemingly diverse types of reactivity using frontier-molecular-orbital considerations.
This is the In Class Activity that I use to review the concepts of Lewis Dot Structures, LDS, (connectivity, resonance, formal charges, etc.) learned in General Chemistry and to introduce new ideas of resonance contributions to the character of the molecule. The question itself is apparently very simple, but the discussion that it produces can be quite rich and brings in both new and old ideas of LDS, providing both a good review and a good segue into advanced ideas of Lewis Dot Structures.
This is a powerpoint quiz show review that can be used to help students assess themselves on their level of understanding of simple bonding theory and some simple molecular orbital theory. It is appropriate for use in a general chemistry course or at the beginning of an advanced inorganic chemistry course to review simple bonding theory. It was developed as an alternative to using clickers for those departments that do not have clickers or would prefer not to set up clicker questions. Correct answers are shown at the end of each slide.
These 6 slides introduce the nomenclature used to describe the stereochemistry of various polypropylenes (PPs) that can be synthesized by metallocene-catalyzed polymerizations. Although PP is the specific polymer discussed, the nomenclature applies to other alpha-olefin polymerizations.