NMR spectrometers over the years have therefore become bigger, more powerful and more expensive. The alternative ... This effect, called “J-coupling” or “spin-spin coupling” is much smaller, but it is ...

For this reason, 13 C-NMR experiments are usually performed using special pulse sequences capable of removing the scalar coupling between 13 C and 1 H. 14 There are a number of ways in which the ...

Figure 1. A series of 19F NMR spectra monitoring the coupling reaction between 1 and 2 to prepare 3. Results. It is immediately obvious that the signal for 1 decreases over time as the reaction ...

Proton NMR Chemical Shifts and Coupling Constants for Brain Metabolites. NMR Biomed 13(3): 129-153. Kaiser LG, Young K, Meyerhoff DJ, Mueller SG, Matson GB. A Detailed Analysis of Localized ...

Figure 6 shows these coupling partners and additional peaks are marked by arrows and ellipses that are colour-coded. Figure 6. Homonuclear j-resolved spectrum of 200 mM ibuprofen in CDCl 3 showing the ...

The coupling of LC separation with NMR characterization has been employed in a wide range of applications. LC-NMR combines two techniques - liquid chromatography (LC) and nuclear magnetic ...

A hybrid method that combines sparse NMR spectroscopy data with evolutionary residue-residue coupling information is used to solve accurate structures of large proteins. Accurate determination of ...

With the quadrupole coupling constant, C q, information can be obtained on the local symmetry: For ideal cubic, octahedral or tetrahedral coordination (high symmetry), C q is zero. d) The indirect ...