Agostic interaction

{
  "id": "MLC-T-CHM-000344",
  "term": "Agostic interaction",
  "field": "Chemistry",
  "definition": "A three-center two-electron covalent bond where a hydrogen atom is simultaneously bonded to a carbon atom and a transition metal center. This interaction involves the donation of electron density from a C-H sigma bond to a vacant d-orbital on the metal. The presence of an agostic interaction is characterized by a lengthened C-H bond, a shortened M-H distance, and a reduced C-H stretching frequency in infrared spectroscopy.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "activation",
    "agostic",
    "coordination"
  ],
  "references": [
    "PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1922 (https://doi.org/10.1351/pac199971101919)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/agostic-interaction/"
}