Complexes or (coordination) compounds involving carbon monoxide as a ligand. For compounds of the carbonyl group use carbonyl-compounds instead.

Complexes or (coordination) compounds involving carbon monoxide as a ligand. The second part of the IUPAC goldbook definition of carbonyl compounds:

Metal carbonyls, in which carbon monoxide is a formal ligand.

For questions about compounds containing the carbonyl group, C=O, use instead.

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