20elektronensystemen
20elektronensystemen refers to organometallic or inorganic complexes in which the metal center carries a total of 20 valence electrons, exceeding the common 18-electron rule. This category is relatively rare and typically involves unusual combinations of ligands, low oxidation states, or metal–metal bonding that increase the electron density at a single metal center.
Electron counting for these systems follows the standard neutral counting approach: the metal’s valence electrons plus
Stabilization strategies in 20electron systems often rely on ligand design. Bulky, chelating, or rigid ligands can
In practice, 20-electron systems are a niche topic within inorganic and organometallic chemistry. They are of