| Journal Articles: 18 results |
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Measurement of the Isotopic Ratio of 10B/11B in NaBH4 by 1H NMR Murray Zanger and Guillermo Moyna
A simple and remarkably accurate method for estimating the isotopic ratio between 10B and 11B through the use of 1H nuclear magnetic resonance (NMR) spectroscopy is presented. The experiment relies on the splitting caused by 10B (I = 3) and 11B (I = 3/2) on the 1H signal of a proton directly bound to boron, a phenomenon readily observed on an aqueous sample of NaBH4. In combination with a brief lecture or prelaboratory presentation, this laboratory can serve to introduce students to magnetic properties as well as theoretical and experimental aspects of NMR spectroscopy as early as the freshman-level chemistry.
Zanger, Murray; Moyna, Guillermo. J. Chem. Educ. 2005, 82, 1390.
Instrumental Methods |
Magnetic Properties |
NMR Spectroscopy |
Atomic Properties / Structure |
Isotopes
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Determination of Spin—Lattice Relaxation Time Using 13C NMR. An Undergraduate Physical Chemistry Laboratory Experiment Zbigniew L. Gasyna and Antoni Jurkiewicz
A 13C NMR experiment is proposed in which spinlattice relaxation time T1 is determined for carbon atoms in a sample of liquid n-hexanol.
Gasyna, Zbigniew L.; Jurkiewicz, Antoni. J. Chem. Educ. 2004, 81, 1038.
NMR Spectroscopy |
Kinetics
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Hybridization and Structural Properties
(re J. Chem. Educ. 1998, 75, 888-890) Victor M. S. Gil
Clarifying cause-effect relationships between orbital hybridization and structural properties.
Gil, Victor M. S. J. Chem. Educ. 2001, 78, 31.
MO Theory |
Instrumental Methods |
NMR Spectroscopy |
Molecular Properties / Structure
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Hybridization and Structural Properties
(re J. Chem. Educ. 1998, 75, 888-890) Victor M. S. Gil
Clarifying cause-effect relationships between orbital hybridization and structural properties.
Gil, Victor M. S. J. Chem. Educ. 2001, 78, 31.
MO Theory |
Instrumental Methods |
NMR Spectroscopy |
Molecular Properties / Structure
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Simple and Inexpensive Classroom Demonstrations of Nuclear Magnetic Resonance and Magnetic Resonance Imaging Joel A. Olson, Karen J. Nordell, Marla A. Chesnik, Clark R. Landis, and Arthur B. Ellis, M. S. Rzchowski, S. Michael Condren, and George C. Lisensky
Several demonstrations of resonance phenomena associated with nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) are described. Complete instructions for the construction of the demonstrations, which can be used on an overhead projector, are included.
Olson, Joel A.; Nordell, Karen J.; Chesnik, Marla A.; Rzchowski, M. S.; Condren, S. Michael; Landis, Clark R.; Lisensky, George C.; Ellis, Arthur B. J. Chem. Educ. 2000, 77, 882.
Instrumental Methods |
Magnetic Properties |
NMR Spectroscopy
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Conformation Interchange in Nuclear Magnetic Resonance Spectroscopy Keith C. Brown, Randy L. Tyson, and John A. Weil
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.
Brown, Keith C.; Tyson, Randy L.; Weil, John A. J. Chem. Educ. 1998, 75, 1632.
Magnetic Properties |
Molecular Properties / Structure |
NMR Spectroscopy |
Stereochemistry |
Aromatic Compounds
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The Fourier transform in chemistry--NMR: Part 4. Two-dimensional methods Williams, Kathryn R.; King, Roy W.
This article will conclude the series with an examination of some of the most important types of two-dimensional spectra.
Williams, Kathryn R.; King, Roy W. J. Chem. Educ. 1990, 67, A125.
Fourier Transform Techniques |
NMR Spectroscopy
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The Fourier transform in chemistry--NMR: Part 3. Multiple-pulse experiments Williams, Kathryn R.; King, Roy W.
This paper will provide the average chemist with an introduction to the information that can be gained from Fourier transform in chemistry.
Williams, Kathryn R.; King, Roy W. J. Chem. Educ. 1990, 67, A93.
Fourier Transform Techniques |
NMR Spectroscopy
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The Fourier transform in chemistry. Part 1. Nuclear magnetic resonance: Introduction King, Roy W.; Williams, Kathryn R.
Provides a fundamental understanding and appreciation of FT-NMR.
King, Roy W.; Williams, Kathryn R. J. Chem. Educ. 1989, 66, A213.
Fourier Transform Techniques |
NMR Spectroscopy |
Instrumental Methods
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Fourier analysis and structure determination. Part II. Pulse NMR and NMR imaging Chesick, John P.
In this paper the authors seek to extend and amplify two previous articles dealing with pulse NMR with extension in more detail to the application of NMR imaging.
Chesick, John P. J. Chem. Educ. 1989, 66, 283.
Fourier Transform Techniques |
NMR Spectroscopy
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A step-by-step picture of pulsed (time domain) NMR Schwartz, Leslie J.
The goal of this paper is to describe a pulsed NMR experiment that is as simple and pictorial as possible, but that stops short of dangerous generalizations and oversimplifications that can lead to contradictions.
Schwartz, Leslie J. J. Chem. Educ. 1988, 65, 752.
NMR Spectroscopy |
Magnetic Properties |
Instrumental Methods
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A straightforward way to determine relative intensities of spin-spin splitting lines of equivalent nuclei in NMR spectra Orcutt, Ronald H.
Because of the increasingly widespread availability of FT-NMR spectrometers with multinuclear capability, it is desirable to have a simple rule for predicting relative intensities to be expected in spin systems other than {-1/2, +1/2}.
Orcutt, Ronald H. J. Chem. Educ. 1987, 64, 763.
NMR Spectroscopy |
Fourier Transform Techniques
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An analogy of the NMR effect Lee, Albert W. M.
Analogy using the difference between standing upright and on one's head in the earth's gravitational field.
Lee, Albert W. M. J. Chem. Educ. 1985, 62, 319.
NMR Spectroscopy
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A demonstration of the basic principle of NMR Meloan, Clifton, E.
Uses a toy gyroscope, wire, and two waste baskets.
Meloan, Clifton, E. J. Chem. Educ. 1982, 59, 154.
NMR Spectroscopy |
Magnetic Properties
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Nuclear magnetic resonance coupling constants and electronic structure in molecules Venanzi, Thomas J.
Describes the theory of NMR spin-spin coupling constants, the nature of the three types of coupling mechanisms contributing to the overall spin-spin coupling constant, and the results for two different types of coupling constants in molecules (carbon-carbon and carbon-nitrogen coupling).
Venanzi, Thomas J. J. Chem. Educ. 1982, 59, 144.
NMR Spectroscopy |
Molecular Properties / Structure
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Phosphorus coupling in 13C and 1H NMR Krudy, George A.; Macomber, Roger S.
Provides a variety of spectra of organophosphorus compounds that exhibit informative 1H and 13C spectra.
Krudy, George A.; Macomber, Roger S. J. Chem. Educ. 1979, 56, 109.
Spectroscopy |
NMR Spectroscopy
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Analysis of complex NMR spectra for the organic chemist. I. Second-order approach with specific application to the two spin system Garbisch, Edgar W., Jr.
Complex spectra of systems containing up to four spins can often be analyzed satisfactorily by hand and offer advantages at the instructive level.
Garbisch, Edgar W., Jr. J. Chem. Educ. 1968, 45, 311.
Spectroscopy |
NMR Spectroscopy
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Nuclear magnetic resonance Richter, Henry L.
This review summarizes the many applications of nuclear magnetic resonance to various fields of chemistry and physics.
Richter, Henry L. J. Chem. Educ. 1957, 34, 618.
NMR Spectroscopy
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