Though exceptions exist, the 18-electron rule, which indicates that diamagnetic 18-electron complexes do not coordinate to a ligand to form a 20-electron complex, is widely accepted. Here, based on the tunable ligand design, the authors report the formation of 20-electron ferrocene derivatives through reversible nitrogen coordination to 18-electron analogues.
- Satoshi Takebayashi
- Jama Ariai
- Noriko Ishizu
