Hexaamminenickel chloride
Chemical compound
From Wikipedia, the free encyclopedia
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]
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6Cl2.png) | |
| Names | |
|---|---|
| IUPAC name
Hexaamminenickel(II) chloride | |
| Other names
Nickel hexammine chloride, hexamminenickel chloride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.149.740 |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Cl2H18N6Ni | |
| Molar mass | 231.78 g·mol−1 |
| Appearance | violet 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).
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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