A ketone with 6 carbons can be named in a couple of ways, depending on where the carbonyl group is located:

* 2-Hexanone: This is the most common name. It indicates the ketone group is on the second carbon of the hexane chain.

* Hexan-2-one: This is a less common but still valid IUPAC name. It uses the same information as the previous name but places the carbonyl group's location after the parent chain name.

There are other possible isomers depending on where the ketone group is attached to the carbon chain, such as 3-hexanone and 4-hexanone.