Conformation Interchange in Nuclear Magnetic Resonance Spectroscopy
Intramolecular dynamics are readily discernible by use of nuclear magnetic resonance spectrometry. A relatively simple laboratory tutorial experiment demonstrating such motion, an internal interchange of conformations, in a readily available nitroaromatic hydrazine (2,2-diphenyl-1-picrylhydrazine in...
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| Veröffentlicht in: | Journal of chemical education 1998-12, Vol.75 (12), p.1632 |
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| container_title | Journal of chemical education |
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| creator | Brown, Keith C Tyson, Randy L Weil, John A |
| description | Intramolecular dynamics are readily discernible by use of nuclear magnetic resonance spectrometry. A relatively simple laboratory tutorial experiment demonstrating such motion, an internal interchange of conformations, in a readily available nitroaromatic hydrazine (2,2-diphenyl-1-picrylhydrazine in liquid solution) is presented and discussed. Simple computer analysis of the 1H line shapes taken on standard NMR equipment at several temperatures produces the activation energy (as well as the pseudothermodynamic enthalpy, entropy, and Gibbs free-energy changes) for the process. The molecular basis for the molecular motion is easily visualizable. |
| doi_str_mv | 10.1021/ed075p1632 |
| format | Article |
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A relatively simple laboratory tutorial experiment demonstrating such motion, an internal interchange of conformations, in a readily available nitroaromatic hydrazine (2,2-diphenyl-1-picrylhydrazine in liquid solution) is presented and discussed. Simple computer analysis of the 1H line shapes taken on standard NMR equipment at several temperatures produces the activation energy (as well as the pseudothermodynamic enthalpy, entropy, and Gibbs free-energy changes) for the process. 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Chem. Educ</addtitle><date>1998-12-01</date><risdate>1998</risdate><volume>75</volume><issue>12</issue><spage>1632</spage><pages>1632-</pages><issn>0021-9584</issn><eissn>1938-1328</eissn><coden>JCEDA8</coden><abstract>Intramolecular dynamics are readily discernible by use of nuclear magnetic resonance spectrometry. A relatively simple laboratory tutorial experiment demonstrating such motion, an internal interchange of conformations, in a readily available nitroaromatic hydrazine (2,2-diphenyl-1-picrylhydrazine in liquid solution) is presented and discussed. Simple computer analysis of the 1H line shapes taken on standard NMR equipment at several temperatures produces the activation energy (as well as the pseudothermodynamic enthalpy, entropy, and Gibbs free-energy changes) for the process. The molecular basis for the molecular motion is easily visualizable.</abstract><cop>Easton</cop><pub>Division of Chemical Education</pub><doi>10.1021/ed075p1632</doi></addata></record> |
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| ispartof | Journal of chemical education, 1998-12, Vol.75 (12), p.1632 |
| issn | 0021-9584 1938-1328 |
| language | eng |
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| source | ACS Publications |
| subjects | Chemistry NMR Nuclear magnetic resonance Resonance Science education Scientific imaging Simulation Spectroscopy |
| title | Conformation Interchange in Nuclear Magnetic Resonance Spectroscopy |
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