Verdazyl radicals

{
  "id": "MLC-T-CHM-012547",
  "term": "Verdazyl radicals",
  "field": "Chemistry",
  "definition": "A family of stable, delocalised organic free radicals built on the 1,2,4,5-tetrazine skeleton, in which a six-membered ring of four nitrogen and two carbon atoms carries an unpaired electron spread over the four nitrogen atoms. They are derived formally from the hydrazyl radical and are usually prepared with aryl groups at the 1, 3 and 5 positions. The first example, 1,3,5-triphenylverdazyl, forms air-stable crystals.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "radical",
    "stable"
  ],
  "references": [
    "PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1374 (https://doi.org/10.1351/pac199567081307)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/verdazyl-radicals/"
}