Chemistry:Benzenehexol

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Benzenehexol, also called hexahydroxybenzene, is an organic compound with formula C6H6O6 or C6(OH)6. It is a six-fold phenol of benzene.[1][2] The product is also called hexaphenol,[3] but this name has been used also for other substances.[4]

Benzenehexol is a crystalline solid soluble in hot water,[3] with a melting point above 310°.[1] It can be prepared from inositol (cyclohexanehexol).[citation needed] Oxidation of benzenehexol yields tetrahydroxy-p-benzoquinone (THBQ), rhodizonic acid, and dodecahydroxycyclohexane.[5] Conversely, benzenehexol can be obtained by reduction of sodium THBQ salt with SnCl2/HCl.[6]

Benzenehexol is a starting material for a class of discotic liquid crystals.[6]

Benzenehexol forms an adduct with 2,2'-bipyridine, with 1:2 molecular ratio.[7]

Benzenehexolate

Like most phenols, benzenehexol can lose the six H+ ions from the hydroxyl groups, yielding the hexaanion C6O6−6. The potassium salt of this anion is one of the components of Liebig's so-called "potassium carbonyl", the product of the reaction of carbon monoxide with potassium. The hexaanion is produced by trimerization of the acetylenediolate anion C2O2−2 when heating potassium acetylenediolate K2C2O2.[8] The nature of K6C6O6 was clarified[9] by Rudolf Nietzki and Theodor Benckiser (de) in 1885, who found that its hydrolysis yielded benzenehexol.[10][11]

The lithium salt of this anion, Li6C6O6 has been considered for electric battery applications.[12]

Esters

Hexahydroxy benzene forms esters such as the hexaacetate C6(-O(CO)CH3)6 (melting point 220 °C) and ethers like hexa-tert-butoxybenzene C6(-OC(CH3)3)6 (melting point 223 °C).[8]

References

  1. ↑ 1.0 1.1 Fatiadi, Alexander J.; Sager, William F.. "Hexahydroxybenzene (Benzenehexol)". https://orgsyn.org/demo.aspx?prep=cv5p0595. 
  2. ↑ Leston, Gerd (2000-12-04), John Wiley & Sons, Inc., ed. (in en), (Polyhydroxy)benzenes, Hoboken, NJ, USA: John Wiley & Sons, Inc., pp. 1615122512051920.a01, doi:10.1002/0471238961.1615122512051920.a01, ISBN 978-0-471-23896-6, https://onlinelibrary.wiley.com/doi/10.1002/0471238961.1615122512051920.a01, retrieved 2023-01-28 
  3. ↑ 3.0 3.1 Codagan, J.I.G.; Buckingham, John; MacDonald, Finlay J.; Rhodes, P. H. (1996). Dictionary of Organic Compounds, 6th edition. London: Chapman & Hall; CRC Press. ISBN 9780412540905. OCLC 35716592. 
  4. ↑ "Hexaphenol (CAS: 1506-76-9)". https://www.chemicalbook.com/ProductChemicalPropertiesCB7111482_EN.htm. 
  5. ↑ Fatiadi, Alexander J.; Isbell, Horace S.; Sager, William F. (March–April 1963). "Cyclic Polyhydroxy Ketones. I. Oxidation Products of Hexahydroxybenzene (Benzenehexol)". Journal of Research of the National Bureau of Standards Section A 67A (2): 153–162. doi:10.6028/jres.067A.015. PMID 31580622. PMC 6640573. http://nvl.nist.gov/pub/nistpubs/jres/067/2/V67.N02.A06.pdf. Retrieved 2009-07-05. 
  6. ↑ 6.0 6.1 Kumar, Sandeep (2006). "Self-organization of disc-like molecules: chemical aspects". Chemical Society Reviews 35 (1): 83–109. doi:10.1039/b506619k. PMID 16365644. https://pubs.rsc.org/en/content/articlelanding/2006/cs/b506619k. 
  7. ↑ Cowan John A., Howard Judith A. K., Leech Michael A., Puschmann Horst, Williams Ian D. (2001). "Hexahydroxybenzene—2,2'-bipyridine (1/2)". Acta Crystallographica Section C 57 (10): 1194–1195. doi:10.1107/S0108270101011350. PMID 11600782. 
  8. ↑ 8.0 8.1 Serratosa Fèlix (1983). "Acetylene Diethers: A Logical Entry to Oxocarbons". Acc. Chem. Res. 16 (5): 170–176. doi:10.1021/ar00089a004. 
  9. ↑  , Wikidata Q56853054
  10. ↑ Ludwig Mond (1892), On metallic carbonyls. Proceedings of the Royal Institution, volume 13, pages 668-680. Reprinted in The Development of Chemistry, 1789-1914: Selected essays edited by D. Knight (1998). ISBN 0-415-17912-2 Online version at books.google.com, accessed on 2010-01-15.
  11. ↑ Büchner Werner, Weiss E (1964). "Zur Kenntnis der sogenannten "Alkalicarbonyle" IV[1] Über die Reaktion von geschmolzenem Kalium mit Kohlenmonoxid". Helvetica Chimica Acta 47 (6): 1415–1423. doi:10.1002/hlca.19640470604. 
  12. ↑ Chen Haiyan, Armand Michel, Courty Matthieu, Jiang Meng, Grey Clare P., Dolhem Franck, Tarascon Jean-Marie, Poizot Philippe (2009). "Lithium Salt of Tetrahydroxybenzoquinone: Toward the Development of a Sustainable Li-Ion Battery". J. Am. Chem. Soc. 131 (25): 8984–8988. doi:10.1021/ja9024897. PMID 19476355. 



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