This is a truly hands-on activity in which students manipulate paper cutouts of carbon atomic orbitals and oxygen group orbitals to identify combinations with identical symmetry and build the carbon dioxide molecular orbital diagram. The activity pairs well with the treatment of MO theory in Miessler, Fischer, and Tarr, Chapter 5. An optional computational modeling component can be added at the end.
This is an in-class activity I made for my students in a Junior/Senior-level one-quarter inorganic course.
Unfortunately it was waaay too long for the 1.5 h class (i gave them about 45 min). I recommend taking this and adapting it to a take-home exercise or homework set, which is probably what I will do this coming year.
Students used Otterbein to look at various structures, starting with low symmetry, working up to very high symmetry structures. I had them go through the "challenge" so they couldn't see the keys at first, but then go back to check their answers.
In this activity, a pair of students are show an object or molecule and are asked to determine the point group before their competitor.
A set of questions to be used in General or Introductory Inorganic Chemistry as a review or “quiz” of shapes and polarities.
Orbital Viewer (http://www.orbitals.com/orb/ov.htm) is a PC-based program that shows electron density calculated from the Schrodinger equation for atoms and molecules. Results can be shown as probability densities or probability surfaces.
Orbital Viewer Program copyright 1986-2004 by David Manthey
This Learning Object involves reading a recent scientific journal article, answering questions relating to the content, and participating in a classroom discussion. The paper under review is “Regeneration of an Iridium (III) Complex Active for Alkane Dehydrogenation Using Molecular Oxygen,” Organometallics, 33, 1337-1340. DOI: /10.1021/om401241e).
This literature discussion is meant to give students an understanding of both the key concept-driven and more “meta” information of a literature paper. Students will use Jillian Dempsey’s paper, “Electrochemical hydrogenation of a homogeneous nickel complex to form a surface-adsorbed hydrogen-evolving species,” to investigate paper authorship, how the scientific method is used in research, and how to understand the important findings of a research article.
Reference: Chem. Commun., 2015, 51, 5290-5293
DOI:10.1039/C4CC08662G
Five slides about how to systematically determine the irreducible representation if provided an unlabeled SALC. These slides focus on molecular orbitals, but this tool can be extended to any kind of SALC.
In this activity, students will use gummies and toothpicks to construct models of molecules that will then be analyzed for their symmetry elements, and ultimately placed into the correct point group and the models can then be consumed.
This in-class activity is designed to give general chemistry students practice with drawing Lewis structures. Small groups of 3-5 students compete for points by creating hypothetical molecules that meet criteria (numbers of elements and atoms) assigned by the professor. Beginning with simple molecules, the basic challenge format calls for increasingly complex criteria in successive rounds of competition. One optional variation also allows student groups to challenge each other for bonus points.