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.

The CFT assumes ligands as point charges, leading to the expectation that anionic ligands would have the highest splitting effect. However, this contradicts the observed positioning of anionic ligands at the low end of the spectrochemical series.

The color of transition metal complexes is complementary to the absorbed light; for example, if green light is absorbed, the complex appears red. The wide range of colors arises from the removal of specific wavelengths from white light as it ...