Английская Википедия:Cobalt(III) hydroxide

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Cobalt(III) hydroxide or cobaltic hydroxide is a chemical compound with formula Шаблон:Chem or Шаблон:Chem. It is an ionic compound, with trivalent cobalt cations Шаблон:Chem and hydroxyl anions Шаблон:Chem.

The compound is known in two structurally different forms, "brownish-black" and "green". The brownish-black form is a stable solid and can be prepared by reaction of water solutions of cobalt(II) chloride and sodium hydroxide, followed by oxidation with ozone.[1]

The green form, formerly thought to be cobalt(II) peroxide, apparently requires carbon dioxide as a catalyst. It can be prepared by adding hydrogen peroxide to a solution of cobalt(II) chloride in 96% ethanol at –30 to –35°C, then adding a 15% solution of sodium carbonate in water with intense stirring. The resulting dark green powder is fairly stable at liquid nitrogen temperature, but at room temperature it turns dark brown within a few days.[2]

Natural occurrence

As of 2020, Cobalt(III) hydroxide is unknown among the known mineral species. However, heterogenite, CoO(OH), is known.[3][4]

See also

References

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Шаблон:Cobalt compounds

  1. Pankratov, D.A., Veligzhanin, A.A., and Zubavichus, Y.V. (2013): "Structural Features of Green Cobalt(III) Hydroxide". Russian Journal of Inorganic Chemistry, volume 58, issue 1, pages 67–73. Шаблон:Doi
  2. Pankratov, D.A., Portachenko, T.A., and Perfil’ev, Y.D. (2008): "Emission Mössbauer Study of 'Cobalt Peroxide'". Moscow University Chemical Bulletin, volume 63, issue 5, pages 292–296. Шаблон:Doi
  3. Шаблон:Cite web
  4. Шаблон:Cite web