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- Croconic_acid abstract "Croconic acid or 4,5-dihydroxycyclopentenetrione is a chemical compound with formula C5H2O5 or (C=O)3(COH)2. It has a cyclopentene backbone with two hydroxyl groups adjacent to the double bond and three ketone groups on the remaining carbon atoms. It is sensitive to light, soluble in water and ethanol and forms yellow crystals that decompose at 212 °C.The compound is acidic and loses the hydrogen cations H+ from the hydroxyls (pK1 = 0.80 ± 0.08 and pK2 = 2.24 ± 0.01 at 25 °C). The resulting anions, hydrogencroconate C5HO5− and croconate C5O52− are also quite stable. The croconate ion, in particular, is aromatic and symmetric, as the double bond and the negative charges become delocalized over the five CO units. The lithium, sodium and potassium croconates crystallize from water as dihydrates but the orange potassium salt can be dehydrated to form a monohydrate. The croconates of ammonium, rubidium and caesium crystallize in the anhydrous form. Salts of barium, lead, silver, etc. are also known.Croconic acid also forms ethers such as dimethyl croconate where the hydrogen atom of the hydroxyl group is substituted with an alkyl group.".
- Croconic_acid thumbnail Croconic_acid.svg?width=300.
- Croconic_acid wikiPageID "23795093".
- Croconic_acid wikiPageRevisionID "602094312".
- Croconic_acid hasPhotoCollection Croconic_acid.
- Croconic_acid imagealt "Skeletal formula".
- Croconic_acid imagealtl "Ball-and-stick model".
- Croconic_acid imagealtr "Space-filling model".
- Croconic_acid imagefile "Croconic acid.svg".
- Croconic_acid imagefilel "Croconic-acid-3D-balls.png".
- Croconic_acid imagefiler "Croconic-acid-3D-spacefill.png".
- Croconic_acid imagesize "160".
- Croconic_acid name "Croconic acid".
- Croconic_acid othernames "45".
- Croconic_acid othernames "Crocic acid".
- Croconic_acid verifiedrevid "422575760".
- Croconic_acid watchedfields "changed".
- Croconic_acid subject Category:Oxocarbons.
- Croconic_acid type ChemicalCompound.
- Croconic_acid type ChemicalSubstance.
- Croconic_acid type ChemicalSubstanceType.
- Croconic_acid type ChemicalObject.
- Croconic_acid type Thing.
- Croconic_acid comment "Croconic acid or 4,5-dihydroxycyclopentenetrione is a chemical compound with formula C5H2O5 or (C=O)3(COH)2. It has a cyclopentene backbone with two hydroxyl groups adjacent to the double bond and three ketone groups on the remaining carbon atoms. It is sensitive to light, soluble in water and ethanol and forms yellow crystals that decompose at 212 °C.The compound is acidic and loses the hydrogen cations H+ from the hydroxyls (pK1 = 0.80 ± 0.08 and pK2 = 2.24 ± 0.01 at 25 °C).".
- Croconic_acid label "Acide croconique".
- Croconic_acid label "Croconic acid".
- Croconic_acid label "Croconzuur".
- Croconic_acid label "クロコン酸".
- Croconic_acid sameAs Acide_croconique.
- Croconic_acid sameAs クロコン酸.
- Croconic_acid sameAs Croconzuur.
- Croconic_acid sameAs m.06_x92y.
- Croconic_acid sameAs Q746380.
- Croconic_acid sameAs Q746380.
- Croconic_acid wasDerivedFrom Croconic_acid?oldid=602094312.
- Croconic_acid depiction Croconic_acid.svg.
- Croconic_acid isPrimaryTopicOf Croconic_acid.
- Croconic_acid name "Croconic acid".
