Class (a) metal ion

{
  "id": "MLC-T-CHM-002098",
  "term": "Class (a) metal ion",
  "field": "Chemistry",
  "definition": "A metal ion characterized by its preference for ligands containing oxygen or fluorine as donor atoms, indicating a hard acid character. These ions are typically small, highly charged, and not easily polarized. Examples include alkali metal ions, alkaline earth metal ions, and early transition metal ions in high oxidation states.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "class (b) metal ion",
    "hard acid",
    "ligands"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1097 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/class-a-metal-ion/"
}