dipolar coupling

in nuclear magnetic resonance spectroscopy

synonym: magnetic dipole–dipole interaction in NMR

https://doi.org/10.1351/goldbook.08330

Direct though-space interactions of nuclear magnetic moment vectors proportional to the inverse cube of internuclear distance.

Note:
In isotropic solution, dipolar couplings average to zero as a result of diffusion but are present in solid-state nuclear magnetic resonance spectroscopy and their effect on nuclear spin relaxation are measurable through nuclear Overhauser effects (NOEs).

Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 685 (https://doi.org/10.1515/pac-2019-0203)