* Aldehydes: The carbonyl group is located at the end of a carbon chain.
* Ketones: The carbonyl group is located within a carbon chain.
* Carboxylic acids: The carbonyl group is attached to a hydroxyl group (-OH).
* Amides: The carbonyl group is attached to a nitrogen atom.
* Esters: The carbonyl group is attached to an oxygen atom that is part of an ether linkage.
* Acyl halides: The carbonyl group is attached to a halogen atom.
* Anhydrides: The carbonyl group is part of a structure with two carbonyl groups linked by an oxygen atom.
The presence and location of the carbonyl group significantly influence the chemical and physical properties of these molecules.
