Hexol

Hexol

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Hexol is a cobalt compound that was first prepared by Alfred Werner in 1914 and represented the first non-carbon-containing chiral compound. The salt with the molecular formula of [Co((OH)2Co(NH3)4)3] (SO4)3 was prepared starting from cobalt(II) sulfate.

Optical resolution of this compound was possible by treating the hexol chloride salt with the resolving agent silver d(+)-bromocamphorsulphonate in dilute acetic acid. The d-Hexol salt precipitated out from solution and the filtrate contained the l-hexol species.Werner also published a second achiral hexol (a minor byproduct from the production of Fremy's salt) that he incorrectly identified as a linear trimer.

In 2004 the second hexol was reinvestigated and found to be a hexanuclear species.

External links

* Hexol Molecule of the Month September 1997 [http://wwwchem.uwimona.edu.jm:1104/MOTM/hexol/hexol.html Website]
* [http://www.npi.gov.au/database/substance-info/profiles/26.html National Pollutant Inventory - Cobalt fact sheet]

References

* A. Werner, H. Kuh, P. Wust Ber. 1914, 47, 196
* "The rediscovery of Alfred Werner's second hexol" W. Gregory Jackson, Josephine A. McKeon, Margareta Zehnder, Markus Neuberger and Silvio Fallab Chemical Communications, 2004, (20), 2322 - 2323 [http://www.rsc.org/publishing/journals/CC/article.asp?doi=b408277j Abstract]


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