Hexaamminenickel chloride

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Hexaamminenickel chloride
NiA6Cl2.svg
Ni(NH3)6Cl2.png
Names
IUPAC name
Hexaamminenickel(II) chloride
Other names
Nickel hexammine chloride, hexamminenickel chloride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.149.740 OOjs UI icon edit-ltr-progressive.svg
PubChem CID
  • InChI=1S/2ClH.6H3N.Ni/h2*1H;6*1H3;/q;;;;;;;;+2/p-2
    Key: ZXZMQWZQMZHFOR-UHFFFAOYSA-L
  • [NH3+][Ni-4]([NH3+])([NH3+])([NH3+])([NH3+])[NH3+].[Cl-].[Cl-]
Properties
Cl2H18N6Ni
Molar mass 231.78 g·mol−1
Appearanceviolet solid
Density 1.51 g/cm3
Melting point decomposes
Solubility soluble in NH3
Structure
octahedral
0 D
Related compounds
Other cations
[Cr(NH3)6]Cl3
[Co(NH3)6]Cl3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Hexaamminenickel chloride is the chemical compound with the formula [Ni(NH3)6]Cl2. It is the chloride salt of the metal ammine complex [Ni(NH3)6]2+. The cation features six ammonia (called ammines in coordination chemistry) ligands attached to the nickel(II) ion. [1]

Contents

Properties and structure

[Ni(NH3)6]2+, like all octahedral nickel(II) complexes, is paramagnetic with two unpaired electrons localized on each Ni center. [Ni(NH3)6]Cl2 is prepared by treating aqueous nickel(II) chloride with ammonia. It is useful as a molecular source of anhydrous nickel(II). [2]

One commercial method for extraction of nickel from its sulfide ores involves the sulfate salt of [Ni(NH3)6]2+. In this process, the partially purified ore is treated with air and ammonia as described with this simplified equation: [3]

NiS + 2 O2 + 6 NH3 → [Ni(NH3)6]SO4

References

  1. ↑ Eßmann, Ralf; Kreiner, Guido; Niemann, Anke; Rechenbach, Dirk; Schmieding, Axel; Sichla, Thomas; Zachwieja, Uwe; Jacobs, Herbert (1996). "Isotype Strukturen einiger Hexaamminmetall(II)‐halogenide von 3d‐Metallen: [V(NH3)6]I2, [Cr(NH3)6]I2, [Mn(NH3)6]Cl2, [Fe(NH3)6]Cl2, [Fe(NH3)6]Br2, [Co(NH3)6]Br2, und [Ni(NH3)6]Cl2". Zeitschrift für anorganische und allgemeine Chemie. 622 (7): 1161–1166. doi:10.1002/zaac.19966220709.
  2. ↑ G. S. Girolami, T. B. Rauchfuss, and R. J. Angelici (1999) Synthesis and Technique in Inorganic Chemistry, University Science Books: Mill Valley, CA. ISBN   0935702482
  3. ↑ Kerfoot, Derek G. E. (2000). "Nickel". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a17_157. ISBN   978-3-527-30385-4.
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