Carbonyl

In organic chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom.

Related Topics:
Organic chemistry - Functional group - Carbon - Atom - Double-bonded - Oxygen

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The term carbonyl can also refer to carbon monoxide as a ligand in an inorganic or organometallic complex (e.g. nickel carbonyl); in this situation, carbon is triple-bonded to oxygen.

Related Topics:
Ligand - Inorganic - Organometallic - Nickel carbonyl - Triple-bonded

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A carbonyl group characterizes the following types of compounds (and a representation of the full group, where -CO means a C=O group):

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• aldehyde- (R-CHO)
• ketone- (R-CO-R₁)
• carboxylic acid- (R-COOH)
• ester- (R-CO-O-R₁)
• amide- (R-CO-NH₂ or R-CO-NHR₁ or R-CO-NR₁R₂)
• enone- R₂-C=CR−CO−R
• acyl chloride- (R-CO-Cl)
• anhydride- (R-CO-O-CO-R)
 
Carbonyl: Reactivity ►