Carbonyl compounds are organic molecules that contain a carbon atom double-bonded to an oxygen atom, known as a carbonyl group (C=O). This functional group is found in various classes of compounds, including aldehydes, ketones, carboxylic acids, and esters. The position of the carbonyl group within the molecule determines its classification and properties. These compounds play a significant role in organic chemistry and are involved in many biological processes. For example, aldehydes are often found in fragrances and flavorings, while ketones are important in the production of solvents and pharmaceuticals. Understanding carbonyl compounds is essential for studying chemical reactions and synthesis.