Illustrated Glossary of Organic Chemistry

Carboxylic acid derivative: A carbonyl-containing functional group other than an aldehyde or ketone, or a molecule containing such a functional group. Called a carboxylic acid derivative because these functional groups can, in principle, be produced (derived) from the corresponding carboxylic acid.

Common Carboxylic Acid Derivatives Related to Acetic Acid, CH₃COOH

Acid chloride (Acyl chloride)		Amide		Anhydride
Carboxylate		Ester		Nitrile
		Thioester

Common Carboxylic Acid Derivatives Related to Carbonic Acid, O=C(OH)₂