Silver thiocyanate

Silver thiocyanate
Names
	IUPAC name Silver(I) thiocyanate, Silver thiocyanate
	Other names Thiocyanic acid, silver (1+) thiocyanate; Silver isothiocyanate; Silver sulphocyanide[1]
Identifiers
CAS Number	1701-93-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	66941 ;
ECHA InfoCard	100.015.395
EC Number	216-934-9;
PubChem CID	74345;
UNII	S44O8TME5U ;
UN number	3077
CompTox Dashboard (EPA)	DTXSID30883742 ;
	InChI InChI=1S/CHNS.Ag/c2-1-3;/h3H;/q;+1/p-1 [inchi] Key: RHUVFRWZKMEWNS-UHFFFAOYSA-M [inchi];
	SMILES C(#N)[S-].[Ag+];
Properties
Chemical formula	AgSCN
Appearance	Colorless crystals
Odor	Odorless
Melting point	170 °C (338 °F; 443 K) ; decomposes[2]
Solubility in water	0.14 mg/L (19.96 °C); 0.25 mg/L (21 °C); 6.68 mg/L (100 °C)[1]
Solubility product (Ksp)	1.03·10−12[3]
Solubility	Insoluble in acids (reacts)[4] except when concentrated, acetates, aq. nitrates[1]
Solubility in silver nitrate	43.2 mg/L (25.2 °C, 3 nAgNO3/H2O)[1]
Solubility in sulfur dioxide	14 mg/kg (0 °C)[2]
Solubility in methanol	0.0022 mg/kg[2]
Magnetic susceptibility (χ)	−6.18·10−5 cm3/mol[3]
Structure
Crystal structure	Monoclinic, mS32 (293 K)[5]
Space group	C2/c, No. 15 (293 K)[5]
Point group	2/m (293 K)[5]
Lattice constant	a = 8.792(5) Å, b = 7.998(5) Å, c = 8.207(5) Å (293 K)[5] α = 90°, β = 93.75(1)°, γ = 90°
Formula units (Z)	8
Thermochemistry
Heat capacity (C)	63 J/mol·K[2]
Std molar; entropy (S⦵298)	131 J/mol·K[2]
Std enthalpy of; formation (ΔfH⦵298)	88 kJ/mol[2]
Hazards
	GHS labelling:
Pictograms	[4]
Signal word	Warning
Hazard statements	H302, H312, H332, H410[4]
Precautionary statements	P273, P280, P501[4]
NFPA 704 (fire diamond)	2 0 0
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Silver thiocyanate is the silver salt of thiocyanic acid with the formula AgSCN.

Structure

AgSCN is monoclinic with 8 molecules per unit cell. Each SCN⁻ group has an almost linear molecular geometry, with bond angle 179.6(5)°. Weak Ag—Ag interactions of length 0.3249(2) nm to 0.3338(2) nm are present in the structure.[5]

Production

Silver thiocyanate is produced by the reaction between silver nitrate and potassium thiocyanate.

References

Comey, Arthur Messinger; Hahn, Dorothy A. (February 1921). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 884.
Anatolievich, Kiper Ruslan. "silver thiocyanate". chemister.ru. Retrieved 2014-07-19.
Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
Sigma-Aldrich Co., Silver thiocyanate. Retrieved on 2014-07-19.
Zhu, H.-L.; Liu, G.-F.; Meng, F.-J. (2003). "Refinement of the crystal structure of silver(I) thiocyanate, AgSCN". Zeitschrift für Kristallographie – New Crystal Structures. München: Oldenbourg Wissenschaftsverlag GmbH. 218 (JG): 263–264. doi:10.1524/ncrs.2003.218.jg.285. ISSN 2197-4578.

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[doc00-1] Comey, Arthur Messinger; Hahn, Dorothy A. (February 1921). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 884.

[chemister-2] Anatolievich, Kiper Ruslan. "silver thiocyanate". chemister.ru. Retrieved 2014-07-19.

[crc-3] Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.

[sigma-4] Sigma-Aldrich Co., Silver thiocyanate. Retrieved on 2014-07-19.

[degruyter-5] Zhu, H.-L.; Liu, G.-F.; Meng, F.-J. (2003). "Refinement of the crystal structure of silver(I) thiocyanate, AgSCN". Zeitschrift für Kristallographie – New Crystal Structures. München: Oldenbourg Wissenschaftsverlag GmbH. 218 (JG): 263–264. doi:10.1524/ncrs.2003.218.jg.285. ISSN 2197-4578.