1. |
Techniques of high resolution nuclear magnetic resonance spectroscopy by W. McFarlane and R. F. M. White, Butterworths, London, 1973, pp. 137. £3.50 (hardback) |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 8-8
P. Bladon,
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ISSN:0030-4921
DOI:10.1002/mrc.1270050613
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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2. |
Ionen‐VI:Das Tetraphenyloborat‐Ion als Kernresonanz‐Verschiebungsreagens bei Anilinium‐Kationen |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 257-261
G. P. Schiemenz,
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摘要:
AbstractB(C6H5)4⊖ ist ein nützliches NMR‐Verschiebungsreagens für Anilinium‐Kationen. Die Signale von N⊕CH‐Protonen werden um 1,1 bis 2,5 ppm zu höherem Feld verschoben. Weiter entfernte Protonen werden weit schwächer beschirmt. Innerhalb gewisser Grenzen kann die Signallage frei gewählt werden. Der Nutzen von Salzmischungen für die Auflösung zufälliger Signalkoinzidenzen und die Signalzuo
ISSN:0030-4921
DOI:10.1002/mrc.1270050602
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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3. |
Long‐range4Jcoupling constants and conformation of the four‐membered heterocycles |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 263-264
A. A. Fomichov,
I. A. Zon,
I. M. Gella,
R. G. Kostyanovsky,
A. N. Saprin,
V. I. Markov,
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摘要:
AbstractThe correlation between the puckering angle of the four‐membered cycle and4Jhas been obtained from analysis of the PMR spectra of some 2‐substituted azetidines and oxetanes. The absolute values of4Jcisand4Jtranswere found to decrease with decreasing of the puckering an
ISSN:0030-4921
DOI:10.1002/mrc.1270050603
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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4. |
Recherches sur la stéréochimie des diènes fonctionnels—X: Etude par Résonance Magnétique Nucléaire d'alcoxybutadiènes 1,3 |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 265-270
J. P. Dorie,
M. L. Martin,
S. Odiot,
F. Tonnard,
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摘要:
AbstractLes paramètres RMN d'alcoxybutadiènes 1,3 dépendent fortement de la configurationcisoutransdu motif éthylénique. Une discussion des différents types de constantes de couplage et des effets d'additivité de substituants sur les déplacements chimiques tente de dégager les facteurs électroniques ou stéréochimiques influencés par un changement de configuration. L'équilibre conformationnel au niveau des liaisons CC et CO est discuté en faisant appel notamment aux effets de solvant aromatique
ISSN:0030-4921
DOI:10.1002/mrc.1270050604
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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5. |
Recherches sur la stéréochimie des diènes fonctionnnels—XI: Interprétation théorique des déplacements chimiques de stéréoisomères D'éthoxybutadiènes‐1,3 |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 271-274
F. Tonnard,
S. Odiot,
J. P. Dorie,
M. L. Martin,
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摘要:
AbstractUne analyse théorique des déplacements chimiques protoniques de stéréoisoméres alcoxydiéniques est proposée. La contribution diamagnétique est évaluée à partir des indices théoriques π et σ obtenus par un calcul de type CNDO/2; ce terme qui dépend de la stéréochimie ne suffit pas à expliquer les écarts expérimentaux, bien que l'alternance des charges refléte celle des déplacements chimiques; la contribution paramagnétique est importante mais reste mal expliquée dans le cadre des méthodes approchées de calcul des effects d'anisotropie et de champélectrique. Cependant l'analyse des résultats apporte des informations sur la nature des équilibres conformationnels
ISSN:0030-4921
DOI:10.1002/mrc.1270050605
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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6. |
The use of DSS as an internal standard in PMR studies of nucleic acid interactions |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 275-276
David. H. Live,
Sunney I. Chan,
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摘要:
AbstractTwo commonly used PMR internal reference compounds, 3‐(trimethyl silyl) propane sulfonic acid sodium salt (DSS) and 3‐(trimethyl silyl) sodium propionate (TSP), have been shown to interact with purine in aqueous solution, causing significant shifts in the resonance position of their reference protons. Tetramethyl ammonium chloride (TMACl) appears to be a more suitable reference compound for such stud
ISSN:0030-4921
DOI:10.1002/mrc.1270050606
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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7. |
Carbon‐13 chemical shifts of substituted nortricyclenes |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 277-283
E. Lippmaa,
T. Pehk,
J. Paasivirta,
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摘要:
Abstract13C NMR spectra of a series of substituted nortricyclene derivatives have been measured, and the13C chemical shifts interpreted in terms of α, β, γ and δ‐effects. The nature of these substiuent shifts is discussed together with some analytical possibilities. The substituent shifts provide valuable data about the steric effects in strained molecules and can be used as increments for structural analysis, particularly for the determination of orientations of substituent g
ISSN:0030-4921
DOI:10.1002/mrc.1270050607
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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8. |
Nuclear magnetic resonace spectra of substituted oxazoles and oxazolidinones |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 285-289
Dennis L. Deavenport,
C. H. Harrison,
D. W. Rathburn,
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摘要:
AbstractDuring the synthesis of 2,5‐disubstituted oxazoles and 4‐oxazolidinones, NMR spectroscopy was utilized to obtain information on the structure, bonding and geometric isomerism in the various compounds. Long range couplings between substituents attached at C2and C5in both ring systems was of particular utility in this respect. The aromaticity of the oxazole ring is substantiated by the ability of the π system to transmit long range coupling through the ring and by the chemical shifts of the ring protons. Geometric isomers of the 4‐oxazolidinones are identified by observing long‐rangecisandtranscouplings of the order of 1·8
ISSN:0030-4921
DOI:10.1002/mrc.1270050608
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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9. |
NMR stereotopic induced shifts in epimeric mixtures |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 291-293
R. Enríquez,
J. Taboada,
I. Salazar,
E. Díaz,
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摘要:
AbstractThe proton NMR spectra of epimeric mixtures of menthone (1), carvomenthone (2), carquejone (3), 2,5‐dimethyl‐1,4‐cyclohexanedione (4) and piqueridione (5) were studied using the chemical shift reagent Eu(DPM)3. The results allow quantifications of the epimers and some conformational assignments to be
ISSN:0030-4921
DOI:10.1002/mrc.1270050609
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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10. |
Proton magnetic resonance studies of compounds with bridgehead nitrogen atoms—XXIII:Deformation of the piperidine ring in some bicyclic compounds possessing a bridgehead amide nitrogen atom |
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Organic Magnetic Resonance,
Volume 5,
Issue 6,
1973,
Page 295-297
R. Cahill,
T. A. Crabb,
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摘要:
AbstractSome bridgehead nitrogen compounds possessing the CH(Me)‐bridgehead NC(O) system have been synthesised and their configurations assigned. The chemical shifts of the proton geminal to the methyl group provides evidence for the existence of a deformed chair conformation for the methyl substituted r
ISSN:0030-4921
DOI:10.1002/mrc.1270050610
出版商:John Wiley&Sons Limited
年代:1973
数据来源: WILEY
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