This is the second part of a two-day class discussion on molecular and inorganic spectroscopy. In this activity, upper level students learn about spectroscopic tecniques used in inorganic chemistry and then devise an experiment to follow the progress of a hypothetical reaction. The activity also prepares students for the inorganic laboratory "Linkage isomerism of nitrogen dioxide" in which infrared spectroscopy is used to monitor changes to the N-O vibrational stretch upon coordination to a metal. During class students use the primary literature to obtain experimental values that are used in the activity and later during the lab.
The first activity is described in a separated VIPEr submission, Inorganic Spectroscopy Introduced Using and Interactive PhET Sumulation (Part 1), and investigates the interaction of light (microwave, infrared, visible, ultraviolet) with small molecules, including nitrogen dioxide.
A special thank you goes to the other contributors of these activities: Julia Chamberlain, PhD; Ted Clark, PhD; and Rebecca Ricciardo, PhD
Students should be able to:
- Describe, in general, how each different region of the electromagnetic spectrum influences molecules.
- Explain how FT-IR can be used to monitor the coordination modes of NO2 on a cobalt complex.
- Interpret data in a literature article and determine how the results in the literature relate to a laboratory experiment.
- Design a series of spectroscopic experiments to identify intermediates in an inorganic synthetic pathway.
Parts of the presentation were designed to be used with a stylus during class discussion portions. Drawing and writing examples are included on the hidden slides as an example (available in the "faculty only" file). These slides can be unhidden and adapted for use without a stylus as well.
Facilitator notes are included as comments on all documents and can be viewed by selecting "Show Comments" under the review tab in Power Point or "Show all markup" under the review tab in Word.
This activity was implemented in a lecture setting with a class of 16 students. The group work was implemented during the 1-hour class that meets weekly and accompanies the 3-hour inorganic laboratory. Students were instructed before class to bring a copy of the article referenced in their laboratory (Penland, Infrared Absorption Spectra of Inorganic Coordination Complexes) and their completed worksheet from the previous week's activity, Inorganic Spectroscopy Introduced Using and Interactive PhET Sumulation (Part 1).