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2001
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In the Laboratory
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Linkage Isomerization by Two-Dimensional 31P Nuclear Magnetic Resonance Spectroscopy. An Undergraduate Inorganic Laboratory Experiment
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Rathindra N. Bose
Department of Chemistry, Kent State University, Kent, OH 44240
Ahmad M. Al-Ajlouni
Department of Chemistry, Jordan University of Science & Technology, Irbid, Jordan
Erika Volckova
Department of Chemistry, Kent State University, Kent, OH 44240
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January 2001
Vol. 78 No. 1
p. 83
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| Abstract |
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An application of two-dimensional 31P NMR spectroscopy is demonstrated through the characterization of linkage isomers of tetraammine(triphosphato)cobalt(III) chelates and metal-promoted hydrolysis of inorganic triphosphate ion. Unambiguous assignments of 31P resonances for two isomers, a,g and b,g chelates, were achieved by the direct through-bond connectivities among the three phosphate groups. The lack of such connectivity also helped to identify cobalt(III)-catalyzed hydrolysis products, orthophosphate and pyrophosphate ions. The experiment provides background information on 2-D NMR spectroscopy including the significance of pulse calibration, relaxation, evolution and mixing times, data processing, and finally, hands-on training for performing 2-D NMR experiments. The experiment is ideally suited for a senior laboratory course and may be included in the core inorganic curriculum required for a certified ACS B.S. degree.
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| Supplement |
Detailed laboratory documentation is available.
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 Contents |
JCE2001p0083W.wpd (WordPerfect 8.0, Windows); F0680668.wpg, F0780668.wpg (Corel Draw, Windows)
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| More Information |
Citation |
Bose, Rathindra N.; Al-Ajlouni, Ahmad M.; Volckova, Erika. J. Chem. Educ. 2001 78 83.
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Keywords |
Inorganic Chemistry; Laboratory Instruction; NMR Spectrometry
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History |
Created:
Last Updated: |
November 30, 2000
August 31, 2005
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January
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