Nickel(II) acetate

Nickel(II) acetate
Names
	Systematic IUPAC name Nickel(2+) diacetate
Identifiers
CAS Number	373-02-4 ; 6018-89-9 (tetrahydrate) ;
3D model (JSmol)	ionic form: Interactive image; coordination form (anhydrate): Interactive image; coordination form (tetrahydrate): Interactive image;
ECHA InfoCard	100.006.147
EC Number	239-086-1;
PubChem CID	9756;
UNII	99QP4ELX96 ; 6SOA8L0560 (tetrahydrate) ;
CompTox Dashboard (EPA)	DTXSID7020926 ;
	InChI InChI=1S/2C2H4O2.Ni/c21-2(3)4;/h21H3,(H,3,4);/q;;+2/p-2;
	SMILES ionic form: [Ni+2].[O-]C(=O)C.[O-]C(=O)C; coordination form (anhydrate): O=C(C)O[Ni]OC(C)=O; coordination form (tetrahydrate): O=C(C)O[Ni-4](OC(C)=O)([O+H2])([O+H2])([O+H2])[O+H2];
Properties
Chemical formula	C4H6NiO4
Molar mass	176.781 g·mol−1
Appearance	Green Solid
Odor	slight acetic acid
Density	1.798 g/cm3 (anhydrous) ; 1.744 g/cm3 (tetrahydrate)
Melting point	decomposes when heated
Solubility in water	Easily soluble in cold water, hot water
Solubility	Soluble in methanol ; insoluble in diethyl ether, n-octanol
Magnetic susceptibility (χ)	+4,690.0·10−6 cm3/mol
Structure
Crystal structure	monoclinic
Space group	P21/c
Lattice constant	a = 4.764, b = 11.771, c = 8.425 Å α = 90°, β = 93.6°, γ = 90° tetrahydrate
Lattice volume (V)	471.5
Formula units (Z)	2
Coordination geometry	distorted octahedral
Hazards
NFPA 704 (fire diamond)	2 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	350 mg/kg (rat, oral); 410 mg/kg (mouse, oral)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Nickel(II) acetate is the name for the coordination compounds with the formula Ni(CH₃CO₂)₂·x H₂O where x can be 0, 2, and 4. The green tetrahydrate Ni(CH₃CO₂)₂·4 H₂O is most common. It is used for electroplating.

^ 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.
^ 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.
^ Downie, T. C.; Harrison, W.; Raper, E. S.; Hepworth, M. A. (15 March 1971). "A three-dimensional study of the crystal structure of nickel acetate tetrahydrate". Acta Crystallographica Section B. 27 (3): 706–712. Bibcode:1971AcCrB..27..706D. doi:10.1107/S0567740871002802.
^ "Nickel metal and other compounds (as Ni)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).

[Mohamed-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.

[Hussein-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.

[3] Downie, T. C.; Harrison, W.; Raper, E. S.; Hepworth, M. A. (15 March 1971). "A three-dimensional study of the crystal structure of nickel acetate tetrahydrate". Acta Crystallographica Section B. 27 (3): 706–712. Bibcode:1971AcCrB..27..706D. doi:10.1107/S0567740871002802.

[4] "Nickel metal and other compounds (as Ni)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).

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Nickel(II) acetate

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