COOH
strutural formula of the carboxyl group
----COOH
-COOH: it is a carbon double bonded to an oxygen, as well as a hydroxyl (OH) group, and another element.
The formula for an amino group is NH2, representing a nitrogen atom bonded to two hydrogen atoms. The formula for a carboxyl group is COOH, representing a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group (OH).
The molecule with only a carboxyl group is called formic acid, with the formula HCOOH. It consists of a carboxyl group, COOH, where the hydrogen atom is attached to the carbon and the hydroxyl group (-OH) is attached to the same carbon.
The carboxyl group is polar.
(NH2)-(RCH)-(COOH) = (amino group)-(central carbon + hydrogen + variable side group)-(carboxyl group)
Formic acid contains a carboxyl functional group (-COOH). This carboxyl group is responsible for its acidic properties and is characteristic of all carboxylic acids. In the case of formic acid, which is the simplest carboxylic acid, it has the chemical formula HCOOH.
I believe you are referring to the carboxyl group, which has the structural formula COOH. The carbon is double bonded to an oxygen atom and single bonded to a hydroxyl group. It can thus be thought of as a carbonyl group bonded to a hydroxyl group.
The chemical formula for the carboxyl ion is -COO−.
Functional groups like carboxylic acids and phenols can act as acids by donating a proton (H+) in a reaction. These functional groups contain an acidic hydrogen atom that can be released as a hydronium ion (H3O+).
The structural formula of 2-methylbutanoic acid after oxidation would involve adding a carboxyl group (-COOH) at the end of the molecule where the -OH group was located in the original alcohol. So the resulting molecule would be 2-methylbutanoic acid with a carboxyl group at the terminal carbon.