carboxyl
an oxygen atom is double bonded to a carbon atom that is also bonded to an -OH group- carboxylic acid
Carboxyl is a functional group that consists of a carbon atom attached to both an oxygen atom and a hydroxyl group (-OH). It is commonly found in organic molecules such as amino acids, fatty acids, and sugars. The carboxyl group can act as an acid, meaning that it can donate a hydrogen ion (H+) in solution. This is because the oxygen atom in the group is highly electronegative, drawing electron density away from the carbon and creating a partial positive charge. Thus, the carboxyl group is responsible for the acidic properties of many biomolecules. Additionally, the carboxyl group is important for mediating chemical reactions such as esterification and peptide bond formation.
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