Nickel(II) thiocyanate

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Nickel(II) thiocyanate
NiNCS2 powder.png
Sample of nickel(II) thiocyanate
NiSCN2 crystal structure.png
Crystal structure of nickel(II) thiocyanate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.808 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 237-205-1
PubChem CID
  • InChI=1S/2CHNS.Ni/c2*2-1-3;/h2*3H;/q;;+2/p-2
    Key: ALYMILAYQDOMFU-UHFFFAOYSA-L
  • C(#N)[S-].C(#N)[S-].[Ni+2]
Properties
Ni(SCN)2
Molar mass 174.86 g/mol [1]
Appearancegreen-brown powder
Density 2.59 g/cm3 [1]
Melting point decomposes [1]
5×10−3 cm3/mol [2]
Structure
Hg(SCN)2 structure
Octahedral
Hazards
GHS labelling:
GHS-pictogram-exclam.svg GHS-pictogram-silhouette.svg GHS-pictogram-pollu.svg
Danger
H317, H334, H341, H350i, H360D, 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 anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Nickel(II) thiocyanate is a coordination polymer with formula Ni(SCN)2. It is a green-brown solid and its crystal structure was determined first in 1982. [1]

Contents

Structure

The structure of Ni(SCN)2 was determined via single-crystal X-ray diffraction and consists of two-dimensional sheets held together through Van der Waals forces. It belongs to mercury thiocyanate structure-type and can be considered a distorted form of the NiBr2 (CdI2) structure. Each nickel is octahedrally coordinated by four sulfurs and two nitrogens. The sulfur end of the SCN− ligand is doubly bridging. [1]

Synthesis

Nickel(II) thiocyanate can be prepared via the reaction of barium thiocyanate and nickel sulfate solutions. After removal of the precipitated barium sulfate, the solution is allowed to evaporate leaving microcrystalline Ni(SCN)2. [3] [4]

Magnetism

Nickel(II) thiocyanate, like nickel(II) iodide, nickel(II) bromide and nickel(II) chloride, is an antiferromagnet at low temperatures. [2]

References

  1. 1 2 3 4 5 Dubler, Erich; Relier, Armin; Oswald, H. R. (1982-01-01). "Intermediates in thermal decomposition of nickel(II) complexes: The crystal structures of Ni(SCN)2(NH3)2 and Ni(SCN)2". Zeitschrift für Kristallographie – Crystalline Materials. 161 (1–4): 265–278. doi:10.1524/zkri.1982.161.14.265. ISSN   2196-7105. S2CID   201671776.
  2. 1 2 DeFotis, G. C.; Dell, K. D.; Krovich, D. J.; Brubaker, W. W. (1993-05-15). "Antiferromagnetism of Ni(SCN)2". Journal of Applied Physics. 73 (10): 5386–5388. Bibcode:1993JAP....73.5386D. doi:10.1063/1.353740. ISSN   0021-8979.
  3. ↑ Geers, Madeleine; Jarvis, David M.; Liu, Cheng; Saxena, Siddharth S.; Pitcairn, Jem; Myatt, Emily; Hallweger, Sebastian A.; Kronawitter, Silva M.; Kieslich, Gregor; Ling, Sanliang; Cairns, Andrew B.; Daisenberger, Dominik; Fabelo, Oscar; Cañadillas-Delgado, Laura; Cliffe, Matthew J. (2023). "High-pressure behavior of the magnetic van der Waals molecular framework Ni(NCS)2". Physical Review B. 108 (14) 144439. doi:10.1103/PhysRevB.108.144439.
  4. ↑ Bassey, Euan N.; Paddison, Joseph A. M.; Keyzer, Evan N.; Lee, Jeongjae; Manuel, Pascal; Da Silva, Ivan; Dutton, Siân E.; Grey, Clare P.; Cliffe, Matthew J. (2020). "Strengthening the Magnetic Interactions in Pseudobinary First-Row Transition Metal Thiocyanates, M(NCS)2". Inorganic Chemistry. 59 (16): 11627–11639. doi:10.1021/acs.inorgchem.0c01478. PMID   32799496.
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