Benzene Ligands

Benzene (η⁶-C₆H₆)

Electron Contribution: 6 electrons (neutral ligand).

Hapticity: η⁶ (hexahapto coordination).

Key Features:

• Aromatic π-system used in organometallic complexes.
• Example: [Cr(η⁶-C₆H₆)(CO)₃] or ruthenium (II) biphenyl TsDPEN

Proposed Image: A structure of ruthenium (II) biphenyl TsDPEN complex, highlighting benzene's η⁶ coordination.  This is an asymmetric transfer hydrogenation catalyst for a range of primarily acetophenone derivatives https://doi.org/10.1016/j.jorganchem.2018.08.020