Acyl Groups, RCO-

1. The function  is called an acyl group and in specific cases in named by adding the suffix -oyl to the appropriate hydrocarbon prefix. That is, alkane- ++ -oyl becomes alkanoyl:

Acyl groups also may be called alkanecarbonyl or cycloalkanecarbonyl groups:

2. When an acyl group replaces the hydrogen of alcohols, carboxylic acids, hydrogen halides, ammonia or amines, we have the acyl compounds known as esters, anhydrides, halides, and amides, respectively.

Each of these types of compounds are named as follows.