1,3-Cyclopentanedione is an

organic compound In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. The ...

with the formula (CH₂)₃(CO)₂. It is one of two isomeric cyclopentanediones, the other being

1,2-cyclopentanedione 1,2-Cyclopentanedione is the organic compound with the formula (CH2)3(CO)2. It is one of two isomeric cyclopentanediones, the other being 1,3-cyclopentanedione. It was first prepared by base-induced condensation of di ethylglutarate with dieth ...

. The

enol In organic chemistry, alkenols (shortened to enols) are a type of reactive structure or intermediate in organic chemistry that is represented as an alkene ( olefin) with a hydroxyl group attached to one end of the alkene double bond (). The te ...

is predicted to be about 1-3 kcal/mol more stable than the diketo form. The enol structure has been confirmed by

X-ray crystallography X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles ...

Preparation

The compound is prepared by hydrogenation of 2-cyclopentene-1,4-dione using zinc/acetic acid.

References

{{DEFAULTSORT:Cyclopentanedione, 1, 3- Diketones Cyclic ketones