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Nickel(II) thiocyanate

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| Name =

| ImageFile = NiNCS2_powder.png

| ImageSize = 250px

| ImageCaption = Sample of nickel(II) thiocyanate

| ImageFile1 = NiSCN2_crystal_structure.png

| ImageSize1 = 250px

| ImageCaption1 = Crystal structure of nickel(II) thiocyanate

| OtherNames =

| IUPACName =

| SystematicName =

| Section1 = {{Chembox Identifiers

| CASNo = 13689-92-4

| PubChem = 5145251

| ChemSpiderID = 4318849

| EC_number = 237-205-1

| StdInChI=1S/2CHNS.Ni/c2*2-1-3;/h2*3H;/q;;+2/p-2

| StdInChIKey = ALYMILAYQDOMFU-UHFFFAOYSA-L

| SMILES = C(#N)[S-].C(#N)[S-].[Ni+2]

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| Section2 = {{Chembox Properties

| Formula = Ni(SCN)2

| MolarMass = 174.86 g/mol

| Appearance = green-brown powder

| Density = 2.59 g/cm3

| MeltingPt = decomposes

| MagSus = {{val|5e-3}} cm3/mol

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| Section3 = {{Chembox Structure

| Coordination = Octahedral

| CrystalStruct = Hg(SCN)2 structure

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| Section5 =

| Section6 =

| Section7 = {{Chembox Hazards

| GHSPictograms = {{GHS07}}{{GHS08}}{{GHS09}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|317|334|341|350i|360D|372|410}}

| PPhrases = {{P-phrases|201|202|260|261|264|270|272|273|280|281|285|302+352|304+341|308+313|314|321|333+313|342+311|363|391|405|501}}

| ExternalSDS =

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| Section8 = {{Chembox Related

| OtherAnions = Nickel(II) bromide, Nickel(II) chloride, Nickel(II) iodide

| OtherCations = Copper(I) thiocyanate, Cobalt(II) thiocyanate, Mercury(II) thiocyanate, Ammonium thiocyanate
Potassium thiocyanate

| OtherCompounds =

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}}Nickel(II) thiocyanate is a coordination polymer with formula Ni(SCN)2.{{Cite journal|last1=Dubler|first1=Erich|last2=Relier|first2=Armin|last3=Oswald|first3=H. R.|date=1982-01-01|title=Intermediates in thermal decomposition of nickel(II) complexes: The crystal structures of Ni(SCN)2(NH3)2 and Ni(SCN)2|journal=Zeitschrift für Kristallographie – Crystalline Materials|volume=161|issue=1–4|pages=265–278 |doi=10.1524/zkri.1982.161.14.265|s2cid=201671776|issn=2196-7105}} It is a green-brown solid and its crystal structure was determined first in 1982.

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.

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.{{cite journal |doi=10.1103/PhysRevB.108.144439 |title=High-pressure behavior of the magnetic van der Waals molecular framework Ni(NCS)2 |date=2023 |last1=Geers |first1=Madeleine |last2=Jarvis |first2=David M. |last3=Liu |first3=Cheng |last4=Saxena |first4=Siddharth S. |last5=Pitcairn |first5=Jem |last6=Myatt |first6=Emily |last7=Hallweger |first7=Sebastian A. |last8=Kronawitter |first8=Silva M. |last9=Kieslich |first9=Gregor |last10=Ling |first10=Sanliang |last11=Cairns |first11=Andrew B. |last12=Daisenberger |first12=Dominik |last13=Fabelo |first13=Oscar |last14=Cañadillas-Delgado |first14=Laura |last15=Cliffe |first15=Matthew J. |journal=Physical Review B |volume=108 |issue=14 |page=144439 }}{{cite journal |doi=10.1021/acs.inorgchem.0c01478 |title=Strengthening the Magnetic Interactions in Pseudobinary First-Row Transition Metal Thiocyanates, M(NCS)2 |date=2020 |last1=Bassey |first1=Euan N. |last2=Paddison |first2=Joseph A. M. |last3=Keyzer |first3=Evan N. |last4=Lee |first4=Jeongjae |last5=Manuel |first5=Pascal |last6=Da Silva |first6=Ivan |last7=Dutton |first7=Siân E. |last8=Grey |first8=Clare P. |last9=Cliffe |first9=Matthew J. |journal=Inorganic Chemistry |volume=59 |issue=16 |pages=11627–11639 |pmid=32799496 |url=https://nottingham-repository.worktribe.com/file/4768781/1/PDF%20MNCS2%20Manuscript%20Revised%20Submission%2020200703 }}

Magnetism

Nickel(II) thiocyanate, like nickel(II) iodide, nickel(II) bromide and nickel(II) chloride, is an antiferromagnet at low temperatures.{{Cite journal|last1=DeFotis|first1=G. C.|last2=Dell|first2=K. D.|last3=Krovich|first3=D. J.|last4=Brubaker|first4=W. W.|date=1993-05-15|title=Antiferromagnetism of Ni(SCN)2|journal=Journal of Applied Physics|volume=73|issue=10|pages=5386–5388|doi=10.1063/1.353740|bibcode=1993JAP....73.5386D |issn=0021-8979}}

References

{{Reflist}}

{{Nickel compounds}}

Category:Nickel compounds

Category:Coordination polymers