Ketones

KETONES

Figure 24.

In such cases, ketones are named by replacing the “ane” with “anone”. If there is more than one CO group in the chain, it is referred to as anedione or anetrione. The locations of the CO carbon are numbered in the name. The rules include the fact that the carbonyl group takes precedence over double bonds, alkyl groups, and halogens in the numbering of the parent chain. If there are double bonds, the “en” suffix is added after the parent chain and before the “one” suffix, such as 4-penten-2-one. Note that the numbering precedence gives the lowest number to the carbonyl group. The suffix “dione” is used when there are two carbonyl groups. Figure 25 names some ketones:

Figure 25.