This effect, called “J-coupling” or “spin-spin coupling” is much smaller, but it is still seen in a standard NMR spectrum as a splitting of the main absorption peaks. In the absence of an applied ...

In addition, the resonance frequencies are purturbed by the existance of neighboring NMR active nuclei, in a manner dependent on the bonding electrons that connect the nuclei. This is knows as ...

(This is the direct through-space interaction between pairs of magnetic dipoles, not the J-coupling seen in liquids, which operates through chemical bonds). The energy of interaction between a pair of ...

Figure 3. Full 19 F NMR spectrum of perfluoro-n-butyl ethylene. Inset: Multiplet analysis of the splitting pattern of individual peaks, with a J-coupling tree and coupling constants overlaid on the ...

d) The indirect spin-spin coupling is a magnetic interaction between at least two NMR nuclei which is transmitted by bonding electrons. This interaction (sometimes also called J coupling) is only ...