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2003
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In the Laboratory
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Studying a Ligand Substitution Reaction with Variable Temperature 1H NMR Spectroscopy: An Experiment for Undergraduate Inoganic Chemistry Students
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Jeffery A. Orvis, Basant Dimetry, Jeffery Winge, and T. Corbin Mullis
Department of Chemistry, Georgia Southern University, Statesboro, GA 30460-8064
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July 2003
Vol. 80 No. 7
p. 803
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| Abstract |
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The study of ligand substitution reactions of transition metal complexes is often a significant component of undergraduate courses in inorganic chemistry. In the laboratory, many undergraduates have studied the aquation of [Co(NH3)5Cl]2+at elevated temperatures, taking aliquots of the reaction mixture, and obtaining a series of UV–vis spectra. Recently, an improved synthesis of a similar complex, trans-[Co(NH3)4Cl2]+ was reported. This complex undergoes aquation in less than an hour at room temperature, much faster than [Co(NH3)5Cl]2+, and is readily monitored by 1H NMR spectroscopy. This reaction forms the basis of an instructive, multi-week laboratory experience in inorganic synthesis, followed by an analysis of a reaction mechanism using a classical activation parameter determination.
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| Supplement |
Instructions for the students and notes for the instructor are available.
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 Contents |
JCE2003p0803W.wpd (WordPerfect)
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| More Information |
Citation |
Orvis, Jeffery A.; Dimetry, Basant; Winge, Jeffery; Mullis, T. Corbin. J. Chem. Educ. 2003 80 803.
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Keywords |
Inorganic Chemistry; Kinetics; Laboratory Instruction; Mechanisms; NMR Spectrometry; Aqueous Solution Chemistry; Coordination Chemistry; Inorganic Synthesis; Inquiry-Based / Discovery Method; Cobalt
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History |
Created:
Last Updated: |
June 4, 2003
February 28, 2005
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