Results 211 to 220 of about 223,391 (261)
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ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ludger Ernst, Kerstin Ibrom
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AbstractFor Abstract see ChemInform Abstract in Full Text.
Ludger Ernst, Kerstin Ibrom
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ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Erkki Kolehmainen +2 more
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Erkki Kolehmainen +2 more
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The Journal of Chemical Physics, 1961
The NMR spectra of glycidaldehyde were measured at 40 and 60 Mc/sec. [Complex chemical formula] These complicated spectra of four interacting protons were analyzed by two methods: the ABKY approximation and the iterated ABCD solution. The various mathematical techniques developed should prove useful in the analyses of other complicated spin resonance ...
C. A. Reilly, J. D. Swalen
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The NMR spectra of glycidaldehyde were measured at 40 and 60 Mc/sec. [Complex chemical formula] These complicated spectra of four interacting protons were analyzed by two methods: the ABKY approximation and the iterated ABCD solution. The various mathematical techniques developed should prove useful in the analyses of other complicated spin resonance ...
C. A. Reilly, J. D. Swalen
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Exact Classification of NMR Spectra from NMR Signals
ICASSP 2024 - 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)Nuclear magnetic resonance (NMR) spectroscopy is routinely used to study the properties of matter. Therefore, different materials can be classified according to their NMR spectra. However, the NMR spectra cannot be observed directly, and only the NMR signal, which is a sum of complex exponentials, is directly observable in practice.
Pedro Izquierdo Lehmann +3 more
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On the NMR spectra of pentafluorobenzenes
Journal of Magnetic Resonance (1969), 1969Abstract The AA′BB′C NMR spin systems of the pentafluorobenzene derivatives with the substituents -Cl, -Br, -I, -OH, ⊖-0, -NH 2 , -NH 3 and -CN have been carefully recorded and analyzed completely using in every case iterative fitting to the experimental transitions.
Edward A Cohen +2 more
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NMR spectra of halopermethylpolysilanes
Journal of Organometallic Chemistry, 1974Abstract Proton NMR spectra were determined for the series X(SiMe2)nX (n = 3, 4, 6 and X F, Cl, I) and Me(SiMe2)6X. Fluorine-19 NMR spectrafor the fluorosilanes of these series were also determined. The chemical shift of the methyl protons of the SiMe2X group appears at higher field as the chain length increases.
W.G. Boberski, A.L. Allred
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2010
NMR spectra of many systems governed by axially symmetric second rank tensor interactions exhibit P2(cos θ) dependence on the angle 9 between the symmetry axis and the externally applied magnetic field. For the so-called "powder samples" consisting of many randomly oriented domains the resulting spectrum is the superposition of contributions from each ...
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NMR spectra of many systems governed by axially symmetric second rank tensor interactions exhibit P2(cos θ) dependence on the angle 9 between the symmetry axis and the externally applied magnetic field. For the so-called "powder samples" consisting of many randomly oriented domains the resulting spectrum is the superposition of contributions from each ...
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Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1979
1. An assignment was made of the lines in the13C and1H NMR spectra of the diterpene alcohol lagochilin. 2. The spectral parameters were compared with the characteristic structural traits of lagochilin, which can be used to establish the structure, configuration, and conformation of diterpenes of the labdane series.
O. S. Chizhov +2 more
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1. An assignment was made of the lines in the13C and1H NMR spectra of the diterpene alcohol lagochilin. 2. The spectral parameters were compared with the characteristic structural traits of lagochilin, which can be used to establish the structure, configuration, and conformation of diterpenes of the labdane series.
O. S. Chizhov +2 more
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Chemistry of Natural Compounds, 1972
The NMR spectra of 12 coumestans in trifluoroacetic acid have been studied. The same features of the chemical shifts of the ring protons are found in the spectra of the coumestans as in the spectra of the coumarins.
L. L. Simonova +3 more
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The NMR spectra of 12 coumestans in trifluoroacetic acid have been studied. The same features of the chemical shifts of the ring protons are found in the spectra of the coumestans as in the spectra of the coumarins.
L. L. Simonova +3 more
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Chemistry of Heterocyclic Compounds, 1978
The 13C and 1H NMR spectra of 1-arylaziridines, 2-phenyl-1-arylaziridines, and 2-aryl-1-phenylaziridines were studied. The additive contributions of aziridinyl, 1-phenyl-2-aziridinyl, and 2-phenyl-1-aziridinyl substituents to the shielding of the aromatic protons were calculated.
�. �. Liepin'sh +3 more
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The 13C and 1H NMR spectra of 1-arylaziridines, 2-phenyl-1-arylaziridines, and 2-aryl-1-phenylaziridines were studied. The additive contributions of aziridinyl, 1-phenyl-2-aziridinyl, and 2-phenyl-1-aziridinyl substituents to the shielding of the aromatic protons were calculated.
�. �. Liepin'sh +3 more
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