Proton affinity

{
  "id": "MLC-T-CHM-009608",
  "term": "Proton affinity",
  "field": "Chemistry",
  "definition": "The negative of the enthalpy change for the gas-phase reaction of a chemical species with a proton to form its conjugate acid. It represents the intrinsic basicity of a molecule or ion in the absence of solvent effects. Proton affinity is typically measured in kJ/mol.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "proton",
    "chemical species",
    "conjugate acid-base pair",
    "enthalpy",
    "gas-phase basicity",
    "hydron"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1153 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/proton-affinity/"
}