chemical shift anisotropy 

in NMR
Initialism: CSA
https://doi.org/10.1351/goldbook.08320
Chemical shift difference between isotropic and anisotropic states in nuclear magnetic resonance spectroscopy.
Notes:
  1. Nuclei which are part of a specific functional group resonate at different frequencies depending on shielding by the local electronic environment and thus can give information on their relative orientation.
  2. Chemical shift anisotropy also contributes to nuclear spin relaxation.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 683 [Terms] [Paper]
Citation: 'chemical shift anisotropy' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08320 RIS BibTex EndNote
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