Alkanium ions

{
  "id": "MLC-T-CHM-012852",
  "term": "Alkanium ions",
  "field": "Chemistry",
  "definition": "Carbocations derived from alkanes by the addition of a proton, resulting in a pentacoordinate carbon atom. These ions are highly reactive intermediates, typically observed in superacidic media or in the gas phase. The simplest example is the methanium ion, CH5+, which features a carbon atom bonded to five hydrogen atoms.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "alkanes",
    "carbonium ion"
  ],
  "references": [
    "PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1313 (https://doi.org/10.1351/pac199567081307)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/alkanium-ions/"
}