Nickel(II) acetate

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Nickel(II) acetate
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Names
Systematic IUPAC name
Nickel(2+) diacetate
Identifiers
373-02-4 YesY
6018-89-9 (tetrahydrate) YesY
EC Number 239-086-1
Jmol 3D model Interactive image
PubChem 9756
  • InChI=1S/2C2H4O2.Ni/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
  • [Ni+2].[O-]C(=O)C.[O-]C(=O)C
Properties
C4H6NiO4
Molar mass 176.78 g·mol−1
Appearance Green Solid
Odor slight acetic acid
Density 1.798 g/cm3 (anyhdrous)
1.744 g/cm3 (tetrahydrate)
Melting point decomposes when heated [1][2]
Easily soluble in cold water, hot water
Solubility Soluble in methanol
insoluble in diethyl ether, n-octanol
Vapor pressure {{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY verify (what is YesYN ?)
Infobox references

Nickel(II) acetate is the name for inorganic compound with the formula Ni(CH3CO2)2·2 H2O or Ni(CH3COO)2·2 H2O also abbreviated Ni(OAc)2·2 H2O. The green tetrahydrate Ni(CH3COO)2·4 H2O is more common. It is used for electroplating.

Synthesis and structure

The compound can be prepared by treating nickel or nickel(II) carbonate with acetic acid:

NiCO3 + 2 CH3CO2H + 3 H2O → Ni(CH3CO2)2·4 H2O + CO2

The green tetrahydrate has been shown by X-ray crystallography to adopt an octahedral structure, the central nickel centre being coordinated by four water molecules and two acetate ligands.[3] It may be dehydrated in vacuo, by reaction with acetic anhydride,[4] or by heat.[5]

Safety

Nickel salts are carcinogenic and irritate the skin.

References

  1. M. A. Mohamed, S. A. Halawy, M. M. Ebrahim: "Non-isothermal decomposition of nickel acetate tetrahydrate", in: Journal of Analytical and Applied Pyrolysis, 1993, 27 (2), S. 109–110. doi:10.1016/0165-2370(93)80002-H.
  2. G. A. M. Hussein, A. K. H. Nohman, K. M. A. Attyia: "Characterization of the decomposition course of nickel acetate tetrahydrate in air", in: Journal of Thermal Analysis and Calorimetry, 1994, 42, S. 1155–1165; doi:10.1007/BF02546925.
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