carbonyl group
A carbonyl group is an organic functional group (C=O) formed by two atoms of carbon and oxygen connected by a double bond. It is a component of functional groups such as aldehydes, ketones, carboxylic acids, and carboxylic acid derivatives. In organic reactions, the carbonyl group can undergo nucleophilic addition reactions, reduction reactions, etc., and the carbonyl group of aldehydes or ketones can also undergo oxidation reactions.