User:Handedplanes/Iron(II) thiocyanate

Handedplanes/Iron(II) thiocyanate
	File:MnNCS2 powder.png; Sample of iron(II) thiocyanate
	File:MnSCN2 crystal structure.png; Crystal structure of iron(II) thiocyanate
Identifiers
CAS Number	25327-03-1;
3D model (JSmol)	Interactive image;
ChemSpider	147265;
EC Number	?;
PubChem CID	87933869;
	InChI InChI=1S/2CHNS.Mn/c22-1-3;/h23H;/q;;+2/p-2 Key: ALYMILAYQDOMFU-UHFFFAOYSA-L;
	SMILES C(#N)[S-].C(#N)[S-].[Mn+2];
Properties
Chemical formula	Fe(SCN)2
Molar mass	171.10 g/mol
Appearance	red brown powder
Density	2.41 g/cm3
Melting point	decomposes
Magnetic susceptibility (χ)	0.013 cm3/mol
Structure
Crystal structure	Hg(SCN)2 structure
Coordination geometry	Octahedral
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H317, H334, H341, H350i, H360D, H372, H410
Precautionary statements	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	Iron(II)_fluoride,Iron(II)_chloride,Iron(II)_bromide,Iron(II)_iodide
Other cations	Copper(I) thiocyanate, Cobalt(II) thiocyanate, Mercury(II) thiocyanate,Nickel(II) thiocyanate, Ammonium thiocyanate; Potassium thiocyanate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tracking categories (test):

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Iron(II) thiocyanate is a coordination polymer with formula Fe(SCN)₂.^[1] It is a red brown air sensitive solid and its crystal structure first reported in 2020.^[1]

Structure[edit]

The structure of Fe(SCN)₂ was determined via powder 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 MnBr₂ (CdI₂) structure. Each iron is octahedrally coordinated by four sulfurs and two nitrogens. The sulfur end of the SCN- ligand is doubly bridging.^[1]

Synthesis[edit]

Iron(II) thiocyanate can be prepared using salt metathesis using the reaction of potassium thiocyanate K(SCN) and iron(II) tetrafluoroborate in acetonitrile, filtering off the precipitated KBF₄ to yield a solution of Fe(SCN)₂. On removal of acetonitrile a pure microcrystalline powder of Fe(SCN)₂ can be obtained.

Magnetism[edit]

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

References[edit]

^ ^a ^b ^c ^d ^e ^f 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). doi:10.1524/zkri.1982.161.14.265. ISSN 2196-7105.
^ ^a ^b 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. doi:10.1063/1.353740. ISSN 0021-8979.

[:0-1] ^ ^a ^b ^c ^d ^e ^f 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). doi:10.1524/zkri.1982.161.14.265. ISSN 2196-7105.

[: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. doi:10.1063/1.353740. ISSN 0021-8979.

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