Hexaamminenickel chloride is the chemical compound with the formula
3)6">i(NH3)6l
2. It is the chloride salt of the
metal ammine complex
In coordination chemistry, metal ammine complexes are metal complexes containing at least one ammonia () ligand. "Ammine" is spelled this way due to historical reasons; in contrast, alkyl or aryl bearing ligands are spelt with a single "m". Almost ...
3)6">i(NH3)6sup>2+. The cation features six
ammonia
Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous was ...
(called ammines in coordination chemistry)
ligand
In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of the ligand's electr ...
s attached to the
nickel
Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive but large pieces are slow to ...
(II) ion.
Properties and structure
3)6">i(NH3)6sup>2+, like all octahedral nickel(II) complexes, is
paramagnetic
Paramagnetism is a form of magnetism whereby some materials are weakly attracted by an externally applied magnetic field, and form internal, induced magnetic fields in the direction of the applied magnetic field. In contrast with this behavior, d ...
with two unpaired electrons localized on each Ni center.
3)6">i(NH3)6l
2 is prepared by treating aqueous
nickel(II) chloride
Nickel(II) chloride (or just nickel chloride) is the chemical compound NiCl2. The anhydrous salt is yellow, but the more familiar hydrate NiCl2ยท6H2O is green. Nickel(II) chloride, in various forms, is the most important source of nickel for che ...
with
ammonia
Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous was ...
. It is useful as a molecular source of anhydrous nickel(II).
[G. S. Girolami, T. B. Rauchfuss, and R. J. Angelici (1999) ''Synthesis and Technique in Inorganic Chemistry'', University Science Books: Mill Valley, CA.]
References
{{reflist
Nickel complexes
Inorganic compounds
Chlorides
Metal halides
Octahedral compounds
Ammine complexes