Carbonyl vs. Acyl

Carbonyl and Acyl Definitions
Carbonyl
The bivalent group C=O.
Acyl
An organic group having the general formula RCO-, derived from an organic acid.
Carbonyl
A metal compound, such as Ni(CO)4, containing the CO group.
Acyl
(organic chemistry) Any of class of organic radicals, RCO-, formed by the removal of a hydroxyl group from a carboxylic acid.
Carbonyl
(organic chemistry) In organic chemistry, a divalent functional group, (-CO-), characteristic of aldehydes, ketones, carboxylic acids, amides, carboxylic acid anhydrides, carbonyl halides, esters and others.
Acyl
An acid radical, as acetyl, malonyl, or benzoyl. An acyl radical can be depicted as R-CO-, where -CO- is the carbonyl group, and R is the group that characterizes the acyl moiety.
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Carbonyl
(inorganic chemistry) Any compound of a metal with carbon monoxide, such as nickel carbonyl, Ni(CO)4.
Acyl
Any group or radical of the form RCO- where R is an organic group;
An example of the acyl group is the acetyl group
Carbonyl
The radical (CO)´´, occuring, always combined, in many compounds, as the aldehydes, the ketones, urea, carbonyl chloride, etc.
Carbonyl
A compound containing metal combined with carbon monoxide
Carbonyl
Relating to or containing the carbonyl group