Hexaamminenickel chloride

Hexaamminenickel chloride
Names
	IUPAC name Hexaamminenickel(II) chloride
	Other names Nickel hexammine chloride, hexamminenickel chloride
Identifiers
CAS Number	10534-88-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	11230400;
ECHA InfoCard	100.149.740
PubChem CID	22221640;
CompTox Dashboard (EPA)	DTXSID20328152 ;
	InChI InChI=1S/2ClH.6H3N.Ni/h21H;61H3;/q;;;;;;;;+2/p-2 Key: ZXZMQWZQMZHFOR-UHFFFAOYSA-L;
	SMILES N.N.N.N.N.N.[Cl-].[Cl-].[Ni+2];
Properties
Chemical formula	Cl2H18N6Ni
Molar mass	231.78 g·mol−1
Appearance	violet solid
Density	1.51 g/cm3
Melting point	decomposes
Solubility	soluble in NH3
Structure
Coordination geometry	octahedral
Dipole moment	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). Infobox references

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]

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]

Related compounds

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

^ 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.
^ 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
^ Kerfoot, Derek G. E. (2000). "Nickel". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a17_157. ISBN 978-3-527-30385-4.

[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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