Sodium cobaltinitrite

From Infogalactic: the planetary knowledge core
Jump to: navigation, search
Sodium cobaltinitrite
200px
Names
IUPAC name
sodium hexanitritocobaltate(III)
Identifiers
13600-98-1 N
ChemSpider 13198283 YesY
Jmol 3D model Interactive image
PubChem 16211641
  • InChI=1S/Co.6NO2.3Na/c;6*2-1-3;;;/q-3;;;;;;;3*+1 YesY
    Key: IMBXIBFCGMYSME-UHFFFAOYSA-N YesY
  • InChI=1/Co.6NO2.3Na/c;6*2-1-3;;;/q-3;;;;;;;3*+1/rCoN6O12.3Na/c8-2(9)1(3(10)11,4(12)13,5(14)15,6(16)17)7(18)19;;;/q-3;3*+1
    Key: IMBXIBFCGMYSME-PEVTYUNUAJ
  • [Na+].[Na+].[Na+].O=[N+]([O-])[Co-3]([N+]([O-])=O)([N+](=O)[O-])([N+]([O-])=O)([N+]([O-])=O)[N+]([O-])=O
Properties
CoN6Na3O12
Molar mass 403.93 g·mol−1
Vapor pressure {{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Sodium cobaltinitrite is a coordination compound with the formula Na3Co(NO2)6. The anion of this yellow-coloured salt consists of a cobalt(III) center N-bonded to six nitrito ligands. It is a reagent for the qualitative test for potassium and ammonium ions.[1]

Synthesis and reactions

The compound is prepared by oxidation of cobalt(II) salts in the presence of sodium nitrite:[2]

4 [Co(H2O)6](NO3)2 + O2 + 24 NaNO2 → 4 Na3[Co(NO2)6] + 8 NaNO3 + 4 NaOH + 22 H2O

Application for analysis of potassium

Although the sodium cobaltinitrite is soluble in water, it forms the basis of a quantitative determination of potassium, thallium, and ammonium ions. Under the recommended reaction conditions the insoluble double salt, K2Na[Co(NO2)6].H2O is precipitated and weighed.[3] In geochemical analysis, sodium cobaltinitrite is used to distinguish alkali feldspars from plagioclase feldspars in thin section.[4]

See also

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ O. Glemser "Sodium Hexanitritocobaltate(III)" Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1541.
  3. ↑ A.I. Vogel,(1951), Quantitative Inorganic analysis, (2d edition), Longmans Green and Co
  4. ↑ E.H. Bailey and R.E. Stevens,(1960), Selective staining of K-feldspar and plagioclase on rock slabs and thin sections, American Mineralogist vol. 45, pp. 1020-1025.


<templatestyles src="Asbox/styles.css"></templatestyles>

Stub icon

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.
Retrieved from "https://infogalactic.com/w/index.php?title=Sodium_cobaltinitrite&oldid=5079218"