Silver thiocyanate
From Infogalactic: the planetary knowledge core
| 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  |
|
| ChemSpider | 66941 |
| EC Number | 216-934-9 |
| Jmol 3D model | Interactive image |
| PubChem | 74345 |
| UNII | S44O8TME5U |
| 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] |
|
|
Solubility product (Ksp)
|
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 | |
| Monoclinic, mS32 (293 K)[5] | |
| C2/c, No. 15 (293 K)[5] | |
| 2/m (293 K)[5] | |
|
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°
|
|
| Thermochemistry | |
| 63 J/mol·K[4] | |
|
Std molar
entropy (S |
131 J/mol·K[4] |
|
Std enthalpy of
formation (ΔfH |
88 kJ/mol[4] |
| Vapor pressure | {{{value}}} |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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|
| Infobox references | |
Silver thiocyanate is a silver salt of thiocyanic acid with the formula AgSCN.
Structure
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
Silver thiocyanate is produced by the reaction between silver nitrate and potassium thiocyanate.
References
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