Chemical shift anisotropy

{
  "id": "MLC-T-CHM-001964",
  "term": "Chemical shift anisotropy",
  "field": "Chemistry",
  "definition": "The orientation-dependent variation of the chemical shift of a nucleus in nuclear magnetic resonance spectroscopy. This effect arises because the magnetic shielding experienced by a nucleus is not uniform in all directions, causing the resonance frequency to depend on the molecule's orientation relative to the external magnetic field. In solid-state NMR of a powder sample, this results in a broad, asymmetric peak shape rather than a sharp line.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "anisotropic",
    "nuclear magnetic resonance spectroscopy"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 683 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/chemical-shift-anisotropy/"
}