Residual dipolar coupling

{
  "id": "MLC-T-CHM-010221",
  "term": "Residual dipolar coupling",
  "field": "Chemistry",
  "definition": "The small, non-zero dipolar coupling observed in nuclear magnetic resonance (NMR) spectroscopy when molecules are partially aligned in an anisotropic environment, such as a liquid crystalline phase. This coupling provides valuable information about molecular conformation and orientation that is averaged to zero in isotropic solutions. It is measured in hertz (Hz).",
  "subject": "Analytical Chemistry",
  "see_also": [
    "dipolar coupling",
    "anisotropic"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 703 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/residual-dipolar-coupling/"
}