ERIC Number: EJ1208752
Record Type: Journal
Publication Date: 2019-Mar
Pages: 6
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Available Date: N/A
Rhodium Rainbow: A Colorful Laboratory Experiment Highlighting Ligand Field Effects of Dirhodium Tetraacetate
Warzecha, Evan; Berto, Timothy C.; Wilkinson, Chad C.; Berry, John F.
Journal of Chemical Education, v96 n3 p571-576 Mar 2019
A new undergraduate inorganic chemistry laboratory experiment is presented. An introduction of the spectrochemical series and ligand exchange is explored using the coordination complex dirhodium tetraacetate, Rh[subscript 2](OAc)[subscript 4]. Students have measured the absorption spectra of the Rh[subscript 2] complex in the presence of various ligand environments. In dichloromethane solution, Rh[subscript 2](OAc)[subscript 4] displays an absorption feature at 661 nm (222 M[superscript -1] cm[superscript -1]), which shifts to higher energy upon introduction of neutral axial ligands. The magnitude of the shift corresponds to the ligand's placement within the spectrochemical series. Experimental techniques of synthetic coordination chemistry and UV--vis spectroscopy are emphasized in this experiment as well as concepts such as molecular orbital (MO) diagrams and the spectrochemical series.
Descriptors: Laboratory Experiments, Science Instruction, Molecular Structure, Chemistry, Visual Aids, Spectroscopy, Scientific Concepts, Undergraduate Students, Color, Energy, Correlation
Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: N/A