Illustrated Glossary of Organic Chemistry

Alkanoyl group: A group consisting of a carbonyl group bonded to an alkyl group.

General alkanoyl group structure.

Acetyl chloride, an acid chloride whose alkyl group is a methyl group (CH3). The alkanoyl group (an acetyl group) is shown in red.

Methyl benzoate contains a benzoyl group, but does not contain an alkanoyl group.