Agostic

{
  "id": "MLC-T-CHM-000343",
  "term": "Agostic",
  "field": "Chemistry",
  "definition": "Describing an intramolecular interaction where a hydrogen atom attached to a carbon is bonded simultaneously to both the carbon and a coordinatively unsaturated transition metal center. This creates a three-center, two-electron bond involving the metal, carbon, and hydrogen atoms. The presence of an agostic interaction is identified by specific spectroscopic signatures, such as a lowered C-H stretching frequency in infrared spectroscopy and an upfield shift in the proton NMR spectrum.",
  "subject": "Organic and Biomolecular Chemistry",
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1082 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/agostic/"
}