Nickel dicyanide

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Nickel dicyanide
3D model (JSmol)
ECHA InfoCard 100.008.329 Edit this at Wikidata
EC Number
  • 209-160-8
UN number 1653
  • InChI=1S/2CN.Ni/c2*1-2;/q2*-1;+2
  • [C-]#N.[C-]#N.[Ni+2]
  • tetrahydrate: [C-]#N.[C-]#N.O.O.O.O.[Ni+2]
Molar mass 110.729
Appearance yellow-brown solid (dry)
blue gray solid (tetrahydrate)[1]
GHS labelling:
GHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
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]


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[edit]

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[edit]


  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. ^ a b c 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. ^ a b Fernelius, W. C.; Burbage, Joseph J. (1946). "Potassium Tetracyanonickelate(II)". Inorganic Syntheses. 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】.