1. Compounds containing the carbonyl group, C=O. The term is commonly used in the restricted sense of @[email protected] and @[email protected], although it actually includes @[email protected] and derivatives.
    See also:
    oxo compounds
  2. Metal carbonyls, in which carbon monoxide is a formal ligand.
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1325 [Terms] [Paper]