1,2-Cyclohexanedione

1,2-Cyclohexanedione is an organic compound with the formula (CH2)4(CO)2. It is one of three isomeric cyclohexanediones. It is a colorless compound that is soluble in a variety of organic solvents. It can be prepared by oxidation of cyclohexanone by selenium dioxide. The enol is about 1 kcal/mol more stable than the diketo form.

Numerous diimine and dioxime ligands have been prepared from this diketone. It also condenses with 1,2-diamines to give diaza heterocycles.