Cobalt(III) chloride

Cobalt(III) chloride
Names
IUPAC name
Cobalt(III) chloride
Other names
Cobaltic chloride
Cobalt trichloride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.509 Edit this at Wikidata
EC Number
  • 233-574-8
  • InChI=1S/3ClH.Co/h3*1H;/q;;;+3/p-3
    Key: IEKWPPTXWFKANS-UHFFFAOYSA-K
  • Cl[Co](Cl)Cl
Properties
CoCl3
Molar mass 165.2913 g/mol (anhydrous)
Melting point Solid decomposes over −60°C
Solubility soluble in ethanol, diethyl ether
Hazards
GHS labelling:
GHS06: Toxic
Danger
H300, H330
P260, P264, P270, P271, P284, P301+P310, P304+P340, P310, P320, P321, P330, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cobalt(III) chloride or cobaltic chloride is an unstable and elusive compound of cobalt and chlorine with formula CoCl
3. In this compound, the cobalt atoms have a formal charge of +3.[1]

The compound has been reported to exist in the gas phase at high temperatures, in equilibrium with cobalt(II) chloride and chlorine gas.[2][3] It has also been found to be stable at very low temperatures, dispersed in a frozen argon matrix.[4]

Some articles from the 1920s and 1930s claim the synthesis of bulk amounts of this compound in pure form;[5][6] however, those results do not seem to have been reproduced, or have been attributed to other substances like the hexachlorocobaltate(III) anion CoCl3−
6.[1] Those earlier reports claim that it gives green solutions in anhydrous solvents such as ethanol and diethyl ether, and that it is stable only a very low temperatures (below −60 °C).[7]

  1. ^ a b Arthur W. Chester, El-Ahmadi Heiba, Ralph M. Dessau, and William J. Koehl Jr. (1969): "The interaction of cobalt(III) with chloride ion in acetic acid". Inorganic and Nuclear Chemistry Letters, volume 5, issue 4, pages 277-283. doi:10.1016/0020-1650(69)80198-4
  2. ^ Cite error: The named reference schafer was invoked but never defined (see the help page).
  3. ^ W. D. Halstead (1975): "A review of saturated vapour pressures and allied data for the principal corrosion products of iron, chromium, nickel and cobalt in flue gases". Corrosion Science, volume 15, issues 6–12, pages 603-625. doi:10.1016/0010-938X(75)90027-X
  4. ^ David W. Green, Dana P. McDermott, and Adelle Bergman (1983): "Infrared spectra of the matrix-isolated chlorides of iron, cobalt, and nickel." Journal of Molecular Spectroscopy, volume 98, issue 1, pages 111-124. doi:10.1016/0022-2852(83)90206-0
  5. ^ C. Schall and H. Markgraf (1924). Transactions of the American Electrochemical Society, volume 45, page 161.
  6. ^ D. Hibert and C. Duval (1937): Comptes rendues, volume 204, page 780.
  7. ^ Cite error: The named reference schall32 was invoked but never defined (see the help page).