Gas-phase basicity

{
  "id": "MLC-T-CHM-004768",
  "term": "Gas-phase basicity",
  "field": "Chemistry",
  "definition": "A measure of the intrinsic ability of a molecule to accept a proton in the absence of solvent, expressed as the negative of the standard Gibbs energy change for the gas-phase protonation B plus H+ to BH+. The negative of the enthalpy change of the same reaction is the proton affinity, a separate quantity that differs from gas-phase basicity by an entropy term. Values are quoted in kJ/mol and rise with the stability of the protonated form.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "basicity",
    "proton affinity"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1116 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/gas-phase-basicity/"
}