Metal carbonyl

Nickel tetracarbonyl was the first pure metal carbonyl to be discovered.

Metal carbonyls are a type of chemical compound. They are a transition metal coordination complex where the metal atom is connected to molecules of carbon monoxide as ligands.

The term can mean both homoleptic carbonyls, where CO is the only ligand, and heteroleptic carbonyls, which have other ligands as well as carbonyl. "Carbonyl compound" includes both metal carbonyls and organic compounds with a C=O functional group.^[1]

Metal Carbonyl Media

Iron pentacarbonyl: an iron atom with five CO ligands
Sample of iron pentacarbonyl, an air-stable liquid.
Bonding modes of CO in Carbonyl complexes
Energy level scheme of the σ and π orbitals of carbon monoxide
The lowest unoccupied molecular orbital (LUMO) of CO is a π* antibonding MO
Diagram showing synergic π backbonding in transition metal carbonyls
Isomers of dicobalt octacarbonyl
The Berry pseudorotation mechanism for iron pentacarbonyl
The number of infrared-active vibrational modes of several prototypical metal carbonyl complexes.

Sources

↑ International Union of Pure and Applied Chemistry. "Carbonyl compounds". Compendium of Chemical Terminology Internet edition.

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[1] International Union of Pure and Applied Chemistry. "Carbonyl compounds". Compendium of Chemical Terminology Internet edition.

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