Hexaamminenickel chloride explained
Hexaamminenickel chloride is the chemical compound with the formula [Ni(NH<sub>3</sub>)<sub>6</sub>]Cl2. It is the chloride salt of the metal ammine complex [Ni(NH<sub>3</sub>)<sub>6</sub>]2+. The cation features six ammonia (called ammines in coordination chemistry) ligands attached to the nickel(II) ion.[1]
Properties and structure
[Ni(NH<sub>3</sub>)<sub>6</sub>]2+, like all octahedral nickel(II) complexes, is paramagnetic with two unpaired electrons localized on each Ni center. [Ni(NH<sub>3</sub>)<sub>6</sub>]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(NH<sub>3</sub>)<sub>6</sub>]2+. In this process, the partially purified ore is treated with air and ammonia as described with this simplified equation:[3]
Notes and References
- Zeitschrift für anorganische und allgemeine Chemie. Isotype Strukturen einiger Hexaamminmetall(II)‐halogenide von 3d‐Metallen: [V(NH<sub>3</sub>)<sub>6</sub>]I2, [Cr(NH<sub>3</sub>)<sub>6</sub>]I2, [Mn(NH<sub>3</sub>)<sub>6</sub>]Cl2, [Fe(NH<sub>3</sub>)<sub>6</sub>]Cl2, [Fe(NH<sub>3</sub>)<sub>6</sub>]Br2, [Co(NH<sub>3</sub>)<sub>6</sub>]Br2, und [Ni(NH<sub>3</sub>)<sub>6</sub>]Cl2. Ralf. Eßmann. Guido. Kreiner. Anke. Niemann . Dirk. Rechenbach . Axel. Schmieding . Thomas. Sichla . Uwe. Zachwieja . Herbert. Jacobs. 1996. 622. 7. 1161–1166. 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.
- Book: 10.1002/14356007.a17_157 . Nickel . Ullmann's Encyclopedia of Industrial Chemistry . 2000 . Kerfoot . Derek G. E. . 978-3-527-30385-4 .
