Silver thiocyanate

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Silver thiocyanate
Skeletal formula of silver thiocyanate
Ball-and-stick model of silver thiocyanate
Names
IUPAC name
Silver(I) thiocyanate, Silver thiocyanate
Other names
Thiocyanic acid, silver (1+) thiocyanate; Silver isothiocyanate; Silver sulphocyanide[1]
Identifiers
1701-93-5 YesY
ChemSpider 66941 YesY
EC number 216-934-9
Jmol-3D images Image
PubChem 74345
UNII S44O8TME5U YesY
UN number 3077
Properties
CAgNS
Molar mass 165.95 g·mol−1
Appearance Colorless crystals
Odor Odorless
Melting point 170 °C (338 °F; 443 K)
decomposes[4]
0.14 mg/L (19.96 °C)
0.25 mg/L (21 °C)
6.68 mg/L (100 °C)[1]
1.03·10−12[2]
Solubility Insoluble in acids (reacts)[3] 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)[4]
Solubility in methanol 0.0022 mg/kg[4]
−6.18·10−5 cm3/mol[2]
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]
Lattice constant α = 90°, β = 93.75(1)°, γ = 90°
Thermochemistry
63 J/mol·K[4]
131 J/mol·K[4]
88 kJ/mol[4]
Hazards
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)The environment pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)[3]
GHS signal word Warning
H302, H312, H332, H410[3]
P273, P280, P501[3]
EU classification Harmful Xn Dangerous for the Environment (Nature) N
R-phrases R20/21/22, R32, R50/53
S-phrases S13, S36/37, S46, S60, S61
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

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

Structure[edit]

AgSCN is monoclinic with 8 molecules in the cell. The SCN groups has an almost linear molecular geometry, with bond angle 179.6(5)°. Weak Ag—Ag interactions length are 0.3249(2) nm to 0.3338(2) nm which forming one-dimensional zig-zag chain in AgSCN.[5]

Production[edit]

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

References[edit]

  1. ^ a b c d Comey, Arthur Messinger; Hahn, Dorothy A. (1921-02). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 884.  Check date values in: |date= (help)
  2. ^ a b Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0. 
  3. ^ a b c d Sigma-Aldrich Co., Silver thiocyanate. Retrieved on 2014-07-19.
  4. ^ a b c d e f Anatolievich, Kiper Ruslan. "silver thiocyanate". http://chemister.ru. Retrieved 2014-07-19. 
  5. ^ a b c d e 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.