Sydnones

{
  "id": "MLC-T-CHM-011720",
  "term": "Sydnones",
  "field": "Chemistry",
  "definition": "A class of five-membered heterocyclic mesoionic compounds, characterized by a 1,2,3-oxadiazole ring with a carbonyl group and a formal positive charge on the ring nitrogen and a negative charge on the exocyclic oxygen. They are stable dipolar compounds that do not possess a conventional uncharged canonical form. Sydnones are often used in cycloaddition reactions.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "mesoionic compounds"
  ],
  "references": [
    "PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1370 (https://doi.org/10.1351/pac199567081307)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/sydnones/"
}