Definition of Acyl Group

Acyl group belongs to the class of organic compounds and is defined as a functional group referring to any RCO group. The alkyl group R is a chain of carbon consisting of one to hundreds of methyl groups. The R group can be composed of other substituents, functional groups, double or triple bonds.


In an acyl group, the carbon and oxygen share a double bond. The fourth bond can be formed with any group R’ other than hydroxyl –OH because the presence of -OH can lead to the formation of carboxylic acid i.e. RCOOH. Aldehydes, ketones, esters, and amides all are derived from the acyl group.

View More Organic Chemistry Definitions