Osmyl tetra-ammine chloride

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Osmyl tetra-ammine chloride
Short-lived precipitate of [OsO2(NH3)4]Cl2
Names
IUPAC name
TetraamminedioxoOsmium(VI)Chloride
Other names
Osmyl tetramminochloride
Dioxoosmium(2+) chloride ammoniate (1:2:4)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.206.699 Edit this at Wikidata
EC Number
  • 681–563–5
  • InChI=1S/2ClH.4H3N.2O.Os/h2*1H;4*1H3;;;/q;;;;;;;;+2/p-2
    Key: UHBAHWDZFKVBSS-UHFFFAOYSA-L
  • N.N.N.N.O=[Os+2]=O.[Cl-].[Cl-](Cl)Cl
Properties
[OsO2(NH3)4]Cl2
Molar mass 361.3 g/mol
Appearance Yellow powder[1]
slightly soluble[2]
Solubility Insoluble in alcohol, HCl, and solutions of ammonium salts.[3]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Osmyl tetra-ammine chloride (also known as osmyl tetramminochloride[3] and tetraamminedioxoosmium (VI) chloride[1]) is an inorganic chemical compound with the formula [OsO2(NH3)4]Cl2.[4]

Osmyl tetra-ammine chloride can be prepared by adding ammonium chloride to a solution of potassium osmate.[4][3][5]

K2[OsO2(OH)4] + 4NH4Cl → [OsO2(NH3)4]Cl2 + 2KCl + 4H2O[6]

Properties

Osmyl tetra-ammine chloride is prone to decomposition. In boiling water it disproportionates to osmium tetroxide and osmium oxydiammine chloride.[3] When calcined in hydrogen, it yields osmium metal sponge.[4][7]

Despite its low solubility in water, solutions of the tetra-ammine chloride react with potassium ferrocyanide to produce a violet color.[3][4]

Uses

Related compounds

References

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