Nickel dicyanide

Last updated
Nickel dicyanide
Nickel(II)-cyanid.jpg
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.008.329 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 209-160-8
PubChem CID
UNII
UN number 1653
  • InChI=1S/2CN.Ni/c2*1-2;/q2*-1;+2
    Key: NLEUXPOVZGDKJI-UHFFFAOYSA-N
  • [C-]#N.[C-]#N.[Ni+2]
  • tetrahydrate:[C-]#N.[C-]#N.O.O.O.O.[Ni+2]
Properties
Ni(CN)2
Molar mass 110.729
Appearanceyellow-brown solid (dry)
blue gray solid (tetrahydrate) [1]
Hazards
GHS labelling:
GHS-pictogram-exclam.svg GHS-pictogram-silhouette.svg GHS-pictogram-pollu.svg
Danger
H317, H334, H350, H372, H410
P201, P202, P260, P261, P264, P270, P272, P273, P280, P281, P285, P302+P352, P304+P341, P308+P313, P314, P321, P333+P313, P342+P311, P363, P391, P405, P501
Related compounds
Other cations
Iron(II) cyanide
Cobalt(II) cyanide
Related compounds
 Potassium cyanonickelate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Nickel dicyanide is the inorganic compound with a chemical formula Ni(CN)2. It is a gray-green solid that is insoluble in most solvents. [2]

Contents

Production

Addition of two equivalents of sodium or potassium cyanide to a solution of nickel(II) ions in aqueous solution leads to the precipitation of nickel(II) cyanide tetrahydrate. [3] On heating the tetrahydrate to 140 °C, this hydrate converts to anhydrous nickel(II) cyanide. [2]

Chemical properties

K2[Ni(CN)4] (tetracyanonickelate) solution) Potassium tetracyanonickelate solution.jpg
K2[Ni(CN)4] (tetracyanonickelate) solution)

Nickel(II) cyanide dissolves in potassium cyanide solution to produce a yellowish solution containing potassium tetracyanonickelate: [2] [3]

Ni(CN)2 + 2 KCN → K2[Ni(CN)4]

Nickel(II) cyanide will react with dimethylglyoxime (dmgH2) and produce hydrogen cyanide: [4]

Ni(CN)2 + 2 dmgH2 → Ni(dmgH)2 + 2 HCN

See also

Related Research Articles

Cobalt(II) cyanide is the inorganic compound with the formula Co(CN)2. It is coordination polymer that has attracted intermittent attention over many years in the area of inorganic synthesis and homogeneous catalysis.

<span class="mw-page-title-main">Potassium hexafluoronickelate(IV)</span> Chemical compound

Potassium hexafluoronickelate(IV) is an inorganic compound with the chemical formula K
2NiF
6. It can be produced through the reaction of potassium fluoride, nickel dichloride, and fluorine.

<span class="mw-page-title-main">Rhodium hexafluoride</span> Chemical compound with formula RhF₆

Rhodium hexafluoride, also rhodium(VI) fluoride, (RhF6) is the inorganic compound of rhodium and fluorine. A black volatile solid, it is a highly reactive material, and a rare example of a rhodium(VI) compound. It is one of seventeen known binary hexafluorides.

<span class="mw-page-title-main">Cyanonickelate</span> Class of chemical compounds

The cyanonickelates are a class of chemical compound containing anions consisting of nickel atoms, and cyanide groups. The most important of these are the tetracyanonickelates containing four cyanide groups per nickel. The tetracyanonickelates contain the [Ni(CN)4]2− anion. This can exist in solution or in solid salts. The ion has cyanide groups arranged in a square around the central nickel ion. The symmetry of the ion is D4h. The distance from the nickel atom to the carbon is 1.87 Å, and the carbon-nitrogen distance is 1.16 Å. Tetracyanonickelate(II) can be oxidised electrochemically in solution to yield tetracyanonickelate(III) [Ni(CN)4]−. [Ni(CN)4]− is unstable and Ni(III) oxidises the cyanide to cyanate OCN−. Tetracyanonickelate(III) can add two more cyanide groups to form hexacyanonickelate(III).

<span class="mw-page-title-main">Praseodymium(IV) oxide</span> Chemical compound

Praseodymium(IV) oxide is an inorganic compound with chemical formula PrO2.

Iron(II) cyanide is an inorganic compound with the empirical formula Fe(CN)2. It may have a Fe2[Fe(CN)6] structure.

<span class="mw-page-title-main">Neodymium(III) hydroxide</span> Chemical compound

Neodymium(III) hydroxide is an insoluble inorganic compound with the chemical formula Nd(OH)3.

<span class="mw-page-title-main">Samarium(III) hydroxide</span> Chemical compound

Samarium(III) hydroxide is an inorganic compound with chemical formula Sm(OH)3.

Thulium(II) chloride is an inorganic compound with the chemical formula TmCl2.

<span class="mw-page-title-main">Erbium(III) hydroxide</span> Chemical compound

Erbium(III) hydroxide is an inorganic compound with chemical formula Er(OH)3.

<span class="mw-page-title-main">Dysprosium(III) hydroxide</span> Chemical compound

Dysprosium(III) hydroxide is an inorganic compound with the chemical formula Dy(OH)3.

<span class="mw-page-title-main">Neptunium(III) chloride</span> Chemical compound

Neptunium(III) chloride or neptunium trichloride is an inorganic compound with a chemical formula NpCl3. This salt is strongly radioactive.

<span class="mw-page-title-main">Potassium tetracyanonickelate</span> Chemical compound

Potassium tetracyanonickelate is the inorganic compound with the formula K2Ni(CN)4. It is usually encountered as the monohydrate but the anhydrous salt is also known. Both are yellow, water-soluble, diamagnetic solids. The salt consists of potassium ions and the tetracyanonickelate coordination complex, which is square planar.

<span class="mw-page-title-main">Potassium pertechnetate</span> Chemical compound

Potassium pertechnetate is a chemical compound of technetium and potassium, with the chemical formula of KTcO4.

<span class="mw-page-title-main">Nickel(II) perchlorate</span> Compound of nickel

Nickel(II) perchlorate is a inorganic compound with the chemical formula of Ni(ClO4)2, and it is a strong oxidizing agent. Its colours are different depending on water. For example, the hydrate forms cyan crystals, the pentahydrate forms green crystals, but the hexahydrate (Ni(ClO4)2·6H2O) forms blue crystals.

Praseodymium(III) carbonate is an inorganic compound, with a chemical formula of Pr2(CO3)3. The anhydrous form is olive green, and many of its hydrates such as heptahydrate and octahydrate are known. They are all insoluble in water.

<span class="mw-page-title-main">Thulium(III) iodide</span> Chemical compound

Thulium(III) iodide is an iodide of thulium, with the chemical formula of TmI3. Thulium(III) iodide is used as a component of metal halide lamps.

<span class="mw-page-title-main">Cerium(III) acetate</span> Chemical compound

Cerium acetate is an inorganic compound with the chemical formula of Ce(CH3COO)3. It is a white powder that is soluble in water. Its 1.5 hydrate loses water at 133°C to obtain an amorphous anhydrous form, and the amorphous phase changes to crystal at 212°C, and phase changes again at 286°C.

<span class="mw-page-title-main">Gallium perrhenate</span> Chemical compound

Gallium perrhenate is an inorganic compound with the chemical formula of Ga(ReO4)3. It exists in the anhydrous and hydrate forms.

A niobate is an oxo-acid salt formed by niobium(V), and the common forms are metaniobate (NbO3−) and orthoniobate (NbO43−). The most common niobates are lithium niobate (LiNbO3) and potassium niobate (KNbO3).

References

  1. ↑ 《无机化学丛书》.第九卷 锰分族 铁系 铂系. 科学出版社. P286 – "Inorganic Chemistry Series". Volume 9 Manganese Subgroups, Iron Series, Platinum Series. Science Press. P286. Nickel Cyanide (II). 氰化镍(II) – Nickel cyanide(II).
  2. 1 2 3 Gail, Ernst; Gos, Stephen; Kulzer, Rupprecht; Lorösch, Jürgen; Rubo, Andreas; Sauer, Manfred (2004). Ullmann's Encyclopedia of Industrial Chemistry . Weinheim: Wiley-VCH. doi:10.1002/14356007.a08_159.pub2.
  3. 1 2 Fernelius, W. C.; Burbage, Joseph J. (1946). "Potassium Tetracyanonickelate(II)". Inorganic Syntheses. Vol. 2. pp. 227–228. doi:10.1002/9780470132333.ch73. ISBN   9780470132333.
  4. ↑ 《无机化学反应方程式手册》.曹忠良 王珍云 编.湖南科学技术出版社.第十三章 铁系元素. – "Handbook of Inorganic Chemical Reaction Equations". Cao Zhongliang, Wang Zhenyun, ed. Hunan Science and Technology Press. Chapter 13: Iron Series Elements. P379. 【其他含镍的化合物】– 【Other nickel-containing compounds】.
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