In addition to the carbides, other groups of related carbon compounds exist:
*graphite intercalation compounds
*alkali metal fullerides
*endohedral fullerenes, where the metal atom is encapsulated within a fullerene molecule
*metallacarbohedrenes (met-cars) which are cluster compounds containing C units.
*tunable nanoporous carbon, where gas chlorination of metallic carbides removes metal molecules to form a highly porous, near-pure carbon material capable of high-density energy storage.
*transition metal carbene complexes.
* two-dimensional transition metal carbides: MXenes