Magic angle

{
  "id": "MLC-T-CHM-006897",
  "term": "Magic angle",
  "field": "Chemistry",
  "definition": "The specific angle, approximately 54.74 degrees, at which the second-order Legendre polynomial becomes zero. In nuclear magnetic resonance (NMR) spectroscopy, spinning a solid sample at this angle relative to the static magnetic field averages out anisotropic interactions, leading to sharper spectral lines. This technique is known as magic angle spinning (MAS).",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "angle",
    "fluorescence",
    "isotropic",
    "photoselection",
    "polarization",
    "spectroscopy",
    "transition moment"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 367 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/magic-angle/"
}