Spin-statistical factor

{
  "id": "MLC-T-CHM-011228",
  "term": "Spin-statistical factor",
  "field": "Chemistry",
  "definition": "A numerical factor that accounts for the probability of forming a particular spin state from a pair of reacting species. It is derived from the statistical weights of the possible spin configurations of the encounter complex or transition state. For example, in a reaction between two doublet species, the spin-statistical factor for forming a singlet product is 1/4.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "annihilation",
    "diffusion",
    "encounter",
    "encounter-controlled rate",
    "fluorescence",
    "hydrocarbons",
    "quenching"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 428 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/spin-statistical-factor/"
}