NMR Coupling Between Nearby Nuclei

NMR coupling between nearby nuclei changes the signal positions of nuclei in a molecule. The spin state of an NMR-active nucleus can slightly affect its immediate electronic environment. That effect can pass through the bonds and reach NMR-active nuclei up to three bonds away, and sometimes even farther. This interaction is ...

The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment.

This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei, usually up to three bonds away.

This phenomenon, called spin–spin coupling or J-coupling, is mutual and...