Cyclopentanepentone

Cyclopentanepentone, also known as leuconic acid, is a hypothetical organic compound with formula C₅O₅, the fivefold ketone of cyclopentane. It would be an oxide of carbon (an oxocarbon), indeed a pentamer of carbon monoxide.

Cyclopentanepentone

Skeletal formula of cyclopentanepentone
Names
Systematic IUPAC name Cyclopentane-1,2,3,4,5-pentone[1]
Other names Leuconic acid
Identifiers
CAS Number	3617-57-0 Y
3D model (JSmol)	Interactive image
ChemSpider	16788087 N
PubChem CID	12305030
CompTox Dashboard (EPA)	DTXSID90486718
InChI InChI=1S/C5O5/c6-1-2(7)4(9)5(10)3(1)8 N Key: YVVXMBHAKNKELS-UHFFFAOYSA-N N
SMILES O=C1C(=O)C(=O)C(=O)C1=O
Properties
Chemical formula	C5O5
Molar mass	140.050 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

As of 2000, the compound had yet to be synthesized in bulk, but there have been reports of trace synthesis.^[2][3][4]

Related compounds

Cyclopentanepentone can be viewed as the neutral counterpart of the croconate anion C
₅O²⁻
₅.

The compound referred to in the literature and trade as "cyclopentanepentone pentahydrate" (C₅O₅·5H₂O) is probably decahydroxycyclopentane (C₅(OH)₁₀).^[3][5]