Definitions for croconic acid
cro·con·ic acid

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1. croconic acidnoun

   A derivative of cyclopentene having two hydroxyl groups and three carbonyl groups; its anion (croconate) is aromatic

WikipediaRate this definition:0.0 / 0 votes

1. Croconic acid

   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 protons from the hydroxyl groups (pKa1 = 0.80±0.08 and pKa2 = 2.24±0.01 at 25 °C). The resulting anions, hydrogencroconate C5HO−5 and croconate C5O2−5 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 (with two electrons, Hückel's rule means this is an aromatic configuration). 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, and others 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.

WikidataRate this definition:0.0 / 0 votes

1. Croconic acid

   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. 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.

How to pronounce croconic acid?

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Numerology

1. Chaldean Numerology

   The numerical value of croconic acid in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of croconic acid in Pythagorean Numerology is: 7

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Croconic_Acid
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Croconic_Acid
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=croconic acid