carbonylsubstituted

A carbonyl group is a functional group in organic chemistry with the formula C=O. It consists of a carbon atom double-bonded to an oxygen atom. The term "carbonyl substituted" refers to a molecule where one or more hydrogen atoms have been replaced by a carbonyl group. This substitution can occur in various ways, leading to different classes of compounds.

For example, when a carbonyl group replaces two hydrogen atoms on a carbon chain, it forms a ketone. If it replaces one hydrogen atom on a carbon chain and one hydrogen atom of a hydroxyl group, it forms a carboxylic acid. Aldehydes are formed when a carbonyl group replaces one hydrogen atom on a terminal carbon atom and another hydrogen atom. Esters, amides, and acid halides are also examples of carbonyl substituted compounds, each arising from different modifications of the carboxyl group. The presence of a carbonyl group significantly influences a molecule's reactivity and physical properties, often making it a site for nucleophilic attack or reduction.