NMR spectroscopy technique

R. E. Collins, Flow of Fluids through Porous Materials, Reinhold, New York, 1961. C. Dyhowski and R. L. Lichter, eds., NMR Spectroscopy Techniques, Marcel Dekker,... 

Meyer B, Peters T (2003) NMR spectroscopy techniques for screening and identifying ligand binding to protein receptors. Angew Chem Int Ed Engl 42 864-890... 

Part of the NMR spectroscopy techniques mentioned in Section IV.B can be used for quantitative determination of organolithium compounds in solution. 

The substance could be isolated just in small amounts. For structure elucidation NMR spectroscopy techniques were preferred. 

The structures of vanicosides A (1) and B (2) and hydropiperoside (3) were established primarily by one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy techniques and fast atom bombardment (FAB) mass spectrometry (MS).22 The presence of two different types of phenylpropanoid esters in 1 and 2 was established first through the proton (4H) NMR spectra which showed resonances for two different aromatic substitution patterns in the spectrum of each compound. Integration of the aromatic region defined these as three symmetrically substituted phenyl rings, due to three p-coumaryl moieties, and one 1,3,4-trisubstituted phenyl ring, due to a feruloyl ester. The presence of a sucrose backbone was established by two series of coupled protons between 3.2 and 5.7 ppm in the HNMR spectra, particularly the characteristic C-l (anomeric) and C-3 proton doublets... 

Rotational restriction of the amino group has been observed by the NMR spectroscopy technique in a number of cytosines in solution as well as in the crystalline state.64,86,88,89 194 Shoup et al. 89,90 measured the activation parameters for the rotation of the dimethylamino group in N8-dimethylcytosine derivatives. With one exception, the range of activation energies is 15-18 kcal/mole. The activation energies found for 26a and 26b are about twice those reported by Martin and Reese195 for 26c. In this last case, however, the method by which the activation energy was obtained has not been described (usually approximate... 

Bortiatynski, J. M., Hatcher, P. G., and Minard, R. D. (1997).The development of l3C labeling and 13C NMR spectroscopy techniques to study the interaction of pollutants with humic substances. In Nuclear Magnetic Resonance Spectroscopy in Environmental Chemistry. Nanny, M. A., Minear, R. A., and Leenheer, J. A., eds., Oxford University Press, New York, pp. 26-50. 

Proton and carbon NMR spectroscopy have played an increasingly important part in the development of the chemistry and especially the stereochemistry of the compounds considered in this chapter. As the molecules have tended to have more fused rings and substituents, the problems associated with the understanding of the stereochemistry have increased. Sophisticated NMR spectroscopy techniques have been a major tool in uncovering these... 

The coefficient of microheterogeneity has been introduced for the description of the microstructure of binary copolymers with symmetric units (Korshak et al., 1976). At larger number of types of units and/or when the structure isomerism is taken into account, the role of Km will be played by other analogous parameters. A general strategy of the choice of these latter is developed in detail (Korolev and Kuchanov, 1986), while their values are measured by the nuclear magnetic resonance (NMR) spectroscopy technique for a number of polycondensation polymers (Vasnev et al., 1997). 

NMR Spectroscopy Techniques, edited by Cecil Dybowski and Robert L. Lichter... 

NMR Spectroscopy Techniques Second Edition, Revised and Expanded, edited by Martha D. Bruch... 

Current H and 13C NMR spectroscopy techniques, with minimal help from other data, can solve problems of more complex peptide structure, as illustrated (Sano and Kaya, 1995) with a new microcystin, [D-Asp3,Dhb7]microcystin-RR, C48H73N13012 (RMM 1024.5608 = [M + H]+ obtained by high-resolution FAB mass spectrometry... 

Despite all that we know of the essential oil components, many new compounds are constantly being isolated and their structures determined. The determination of the two-dimensional structures of small molecules is becoming much easier based on the intensive development of NMR spectroscopy techniques. On the other hand, the most important breakthrough in the past decade for essential oil study has probably been the development of various chiral stationary phases useful for the separation of enantiomeric mixtures [68-72],... 

Bruch, M.D. Dybowski, C. Spectral editing methods for stmcture elucidation. In NMR Spectroscopy Techniques, 2nd ed. Bruch, M.D., Ed. Marcel Dekker, Inc. New York, 1996. 

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