Triplet state

{
  "id": "MLC-T-CHM-012294",
  "term": "Triplet state",
  "field": "Chemistry",
  "definition": "An electronic state of an atom or molecule in which two electrons have parallel spins, resulting in a total spin angular momentum of S=1. This state has a spin multiplicity of 2S+1 = 3. Transitions from a triplet state to a singlet ground state are spin-forbidden, leading to relatively long lifetimes for triplet excited states compared to singlet excited states.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "multiplicity"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2281 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/triplet-state/"
}