Dipolar coupling

{
  "id": "MLC-T-CHM-003238",
  "term": "Dipolar coupling",
  "field": "Chemistry",
  "definition": "A direct through-space magnetic interaction between two nuclear spins that arises from their magnetic moments and scales with the inverse cube of the internuclear distance, whatever bonds link the nuclei. It depends on the orientation of the internuclear vector to the field and averages to zero in isotropic liquids through rapid tumbling, but it broadens lines and gives distance information in solids. In solid-state NMR, magic-angle spinning averages it.",
  "synonyms": [
    "magnetic dipole-dipole interaction in NMR"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "nuclear Overhauser effect",
    "solid-state nuclear magnetic resonance spectroscopy"
  ],
  "references": [
    "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)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/dipolar-coupling/"
}