Predissociation

{
  "id": "MLC-T-CHM-009373",
  "term": "Predissociation",
  "field": "Chemistry",
  "definition": "A process where a molecule, excited to a discrete rovibronic state, undergoes non-radiative decay to a dissociative continuum of another electronic state with the same energy. This leads to the fragmentation of the molecule even though it was initially excited to a bound state. It results in a broadening of spectral lines in the absorption spectrum.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "absorption spectrum",
    "dissociation",
    "irradiation",
    "tunnelling"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2266 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/predissociation/"
}