The M–C s bond results from the donation of lone pair electrons on the carbonyl carbon into a vacant orbital of the metal, while the M–C p bond arises from the donation of a pair of electrons from a filled ...

Decacarbonyldimanganese(0) consists of two square pyramidal Mn(CO)₅ units joined by a Mn–Mn bond, showcasing a distinctive manganese-manganese interaction.

Tetracarbonylnickel(0) exhibits a tetrahedral structure, pentacarbonyliron(0) is trigonal bipyramidal, and hexacarbonyl chromium(0) adopts an octahedral coordination geometry.

Ligand field theory (LFT) and molecular orbital theory (MOT) are theories that go beyond the crystal field model, providing a more comprehensive explanation for the bonding, structures, and properties of coordination compounds.

The crystal field model does not consider the covalent character of bonding between ligands and the central atom, which is a weakness of the model.