Carboxyl
A carboxyl or carboxylic group is a functional group consisting of a carbon atom and an oxygen atom doubly bonded to each other.It is the univalent acid radical (-COOH)Carboxyl groups are characteristic constituents of more complex functional groups such as carboxylic acids, ketones, aldehydes, and amides. They are present in most organic acids, this making them biodegradable.
The C=O stretch of carboxyl groups can be identified spectroscopically by a sharp peak in the infrared between 1700 and 2100 cm-1.
