Cyclopentanepentone
title: "Cyclopentanepentone" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["oxocarbons", "hypothetical-chemical-compounds", "cyclic-ketones", "polyketones", "conjugated-ketones", "cyclopentanes"] topic_path: "science/chemistry" source: "https://en.wikipedia.org/wiki/Cyclopentanepentone" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
|Verifiedfields = changed |Watchedfields = changed |verifiedrevid = 410048505 |ImageFile = Cyclopentanepentone-2D.png |ImageClass = skin-invert-image |ImageFile_Ref = |ImageSize = 121 |ImageName = Skeletal formula of cyclopentanepentone |ImageFileL1 = File:Cyclopentanepentone-3D-balls.png |ImageFileR1 = Cyclopentanepentone-3D-spacefill.png |ImageAlt1 = leuconic acid molecule |SystematicName = Cyclopentane-1,2,3,4,5-pentone |OtherNames = Leuconic acid |Section1 = {{Chembox Identifiers |CASNo_Ref = |CASNo = 3617-57-0 |PubChem = 12305030 |ChemSpiderID = 16788087 |ChemSpiderID_Ref = |SMILES = O=C1C(=O)C(=O)C(=O)C1=O |StdInChI = 1S/C5O5/c6-1-2(7)4(9)5(10)3(1)8 |StdInChI_Ref = |StdInChIKey = YVVXMBHAKNKELS-UHFFFAOYSA-N |StdInChIKey_Ref = |Section2 = {{Chembox Properties |C=5 | O=5
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.
As of 2000, the compound had yet to be synthesized in bulk, but there have been reports of trace synthesis.
Related compounds
Cyclopentanepentone can be viewed as the neutral counterpart of the croconate anion .
The compound referred to in the literature and trade as "cyclopentanepentone pentahydrate" (C5O5·5H2O) is probably decahydroxycyclopentane (C5(OH)10).
References
References
- "CID 12305030 - PubChem Public Chemical Database". National Center for Biotechnology Information.
- (2000). "The Chemistry of Vicinal Polycarbonyl Compounds". Chemical Reviews.
- (1992). "Oxocarbons and pseudooxocarbons". Chemical Reviews.
- (1999). "Mass spectrometric studies of the oxocarbons C''n''O''n'' (''n'' = 3–6)". International Journal of Mass Spectrometry.
- (1957). "Infrared Spectra and the Structure of Leuconic Acid and Triquinoyl". Journal of Physical Chemistry.
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