Open-shell systems

{
  "id": "MLC-T-CHM-008253",
  "term": "Open-shell systems",
  "field": "Chemistry",
  "definition": "Molecular or atomic systems that possess one or more unpaired electrons in their highest occupied molecular orbitals or atomic orbitals. This electronic configuration results in a net spin angular momentum for the system. Radicals and many transition metal complexes are common examples of open-shell systems, often exhibiting paramagnetism.",
  "subject": "Organic and Biomolecular Chemistry",
  "references": [
    "PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1956 (https://doi.org/10.1351/pac199971101919)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/open-shell-systems/"
}