functional group having a carbon atom and an oxygen atom joined by a double bond; it is found in aldehydes, ketones, esters, and amides.
a carbon-oxygen combination is attached to compounds (such as proteins) during certain chemical reactions
a divalent group of the formula --C(O)--
An organic compound containing the CO group (see below). When a hydrogen atom is attached to the carbon, the resulting compound is known as an aldehyde. When only carbon atoms are attached, the resulting compound is known as a ketone. See also carboxyl group and amide group.
The reactive group to be found in aldehydes, ketones, and acyl compounds, i.e., C = O
a functional group consisting of an oxygen double-bonded to any other atom, usually a carbon.
the C=O 'fragment' in organic compounds.
A chemical group consisting of carbon and oxygen ( C=O). (See also ketone)