Quinhydrones

{
  "id": "MLC-T-CHM-009784",
  "term": "Quinhydrones",
  "field": "Chemistry",
  "definition": "Charge-transfer complexes formed from the co-crystallization of equimolar amounts of a quinone and its corresponding hydroquinone. These compounds are characterized by a deep color, such as dark green or black, arising from the transfer of charge between the electron-donating hydroquinone and the electron-accepting quinone. The quinhydrone electrode, which relies on the redox equilibrium between quinone and hydroquinone, was historically used for pH measurements.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "quinones"
  ],
  "references": [
    "PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1362 (https://doi.org/10.1351/pac199567081307)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/quinhydrones/"
}