Elimination of dispersion-components from high resolution NMR spectra and transverse relaxation times measurement

1997 ◽  
Vol 94 ◽  
pp. 1715-1725
Author(s):  
L Mahi ◽  
JC Duplan ◽  
A Briguet
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Relaxation Times ◽  
Transverse Relaxation ◽  
High Resolution Nmr

The High Resolution NMR Spectra of Pesticides. II. The DDT-Type Compounds

1969 ◽  
Vol 52 (5) ◽  
pp. 1074-1092 ◽  
Author(s):  
L H Keith ◽  
A L Alford ◽  
A W Garrison
Keyword(s):  
Nuclear Magnetic Resonance ◽  
High Resolution ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Coupling Constants ◽  
Aromatic Rings ◽  
Nuclear Magnetic Resonance Spectra ◽  
High Resolution Nmr ◽  
Related Compounds ◽  
Deshielding Effect

Abstract The high resolution nuclear magnetic resonance spectra of the DDT class of pesticides and related compounds are discussed, including a study of the resonances of the aromatic protons as they are affected by various substiluents. The CCl3 moiety on the α-carbon strongly deshields the ortho protons on the aromatic rings, and this deshielding effect is greatly enhanced by substitution of a chlorine ortho rather than para on the aromatic ring. These deshielding effects are explained by a consideration of the electronegativity of the substituents and the stereochemistry of the molecule. The chemical shifts and coupling constants are tabulated.

High resolution nmr spectra of porphin and of porphin derivatives

1970 ◽  
Vol 13 (2) ◽  
pp. 1106-1111 ◽  
Author(s):  
K. N. Solov'ev ◽  
V. A. Mashenkov ◽  
A. T. Gradyushko ◽  
A. E. Turkova ◽  
V. P. Lezina
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
High Resolution Nmr

scholarly journals NMR Experiments of Cyclic Sulfites. IV. Analysis of the High Resolution NMR Spectra of 4-Methyl-, 4-Phenyl-, and 4,6,6-Trimethyl-trimethylene Sulfite.

1972 ◽  
Vol 26 ◽  
pp. 3678-3684 ◽  
Author(s):  
Per Albriktsen ◽  
P. Steenbøl ◽  
B. Søndergaard Sørensen ◽  
Carl-Gunnar Swahn ◽  
Åke Pilotti
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
High Resolution Nmr ◽  
Cyclic Sulfites

scholarly journals Analysis of the High Resolution NMR Spectra of Dihalogenated Toluenes.

1972 ◽  
Vol 26 ◽  
pp. 2511-2517 ◽  
Author(s):  
P. Albriktsen ◽  
G. Hansen ◽  
Olof Samuelson ◽  
Elisabeth Sjöstrand ◽  
Sigfrid Svensson
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
High Resolution Nmr

High‐Resolution NMR Spectra of Polycyclic Hydrocarbons

1966 ◽  
Vol 45 (10) ◽  
pp. 3567-3570 ◽  
Author(s):  
J. D. Memory ◽  
G. W. Parker ◽  
James C. Halsey
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Polycyclic Hydrocarbons ◽  
High Resolution Nmr

The High Resolution NMR Spectra of Pesticides. III. The Carbamates

1970 ◽  
Vol 53 (1) ◽  
pp. 157-179 ◽  
Author(s):  
L H Keith ◽  
A L Alford
Keyword(s):  
Nuclear Magnetic Resonance ◽  
High Resolution ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Coupling Constants ◽  
Hindered Rotation ◽  
Solvent Dependence ◽  
Nuclear Magnetic Resonance Spectra ◽  
High Resolution Nmr ◽  
Proton Resonances

Abstract The high resolution nuclear magnetic resonance spectra of 35 carbamate pesticides and a major metabolite of one pesticide are discussed. The chemical shifts and coupling constants are tabulated and reproductions of the more complex or unusual spectra are included. A concentration and solvent dependence of both the NH-proton and the NCH3-proton resonances of an N-monosubstituted carbamate is discussed. Hindered rotation is observed in the N,N-dimethylcarbamates, the thiolcarbamates and the dithiocarbamates, but not in the N-methylcarbamates.

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