Ketone Definition

What Is a Ketone in Chemistry?

This is the chemical structure of the ketone acetone.
This is the chemical structure of the ketone acetone. Todd Helmenstine

Ketone Definition

A ketone is a compound containing a carbonyl functional group bridging two groups of atoms.

The general formula for a ketone is RC(=O)R' where R and R' are alkyl or aryl groups.

IUPAC ketone functional group names contain "oxo" or "keto". Ketones are named by changing the -e on the end of the parent alkane name to -one.

Examples: Acetone is a ketone. The carbonyl group is connected to the alkane propane, therefore the IUPAC name for acetone would be propanone.