Lithium thiocyanate

Lithium thiocyanate
Names
Other names
  • Lithium sulfocyanate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.008.306 Edit this at Wikidata
EC Number
  • 209-135-1
  • monohydrate: 629-475-8
  • InChI=1S/CHNS.Li/c2-1-3;/h3H;/q;+1/p-1
    Key: ZJZXSOKJEJFHCP-UHFFFAOYSA-M
  • monohydrate: InChI=1S/CHNS.Li.H2O/c2-1-3;;/h3H;;1H2/q;+1;/p-1
    Key: UNTVNJAFDYEXLD-UHFFFAOYSA-M
  • dihydrate: InChI=1S/CHNS.Li.2H2O/c2-1-3;;;/h3H;;2*1H2/q;+1;;/p-1
    Key: TWRGRNSGEYGNBV-UHFFFAOYSA-M
  • [Li+].C(#N)[S-]
  • monohydrate: [Li+].C(#N)[S-].O
  • dihydrate: [Li+].C(#N)[S-].O.O
Properties
LiSCN
Molar mass 65.02 g/mol
Appearance White hygroscopic solid
Density 1.44 g/cm3[1]
Melting point 274 °C (525 °F; 547 K)[2]
Boiling point 550 °C (1,022 °F; 823 K) (decomposition)
125 g/100 ml
Solubility Soluble in alcohol[1]
Structure[2][3]
Orthorhombic (anhydrous, α-monohydrate, dihydrate)
Monoclinic (β-monohydrate)
C2/m (α-monohydrate)
Pnam (β-monohydrate)
Pnma (anhydrous, dihydrate)
a = 1215.1 pm, b = 373.6 pm, c = 529.9 pm (anhydrous)
4 (α, β-monohydrate)
6 (anhydrous, dihydrate)
Tetrahederal (α and β-monohydrate)
Thermochemistry
9 e.u.[1]
5.0 kcal/mol[1]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302+H312+H332, H412
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
4
1
1
Related compounds
Other cations
 Sodium thiocyanate, Potassium thiocyanate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Lithium thiocyanate is a chemical compound with the formula LiSCN. It is an extremely hygroscopic white solid that forms the monohydrate and the dihydrate. It is the least stable of the alkali metal thiocyanates due to the large electrostatic deforming field of the lithium cation.[1]

  1. ^ a b c d e D. A. Lee (1964). "Anhydrous Lithium Thiocyanate". Inorganic Chemistry. 3 (2). ACS Publications: 289–290. doi:10.1021/ic50012a039.
  2. ^ a b Markus Joos; Maurice Conrad; Sebastian Bette; Rotraut Merkle; Robert E. Dinnebier; Thomas Schleid; Joachim Maier (2022). "On the crystal structures of lithium thiocyanate monohydrate LiSCN 1 H2O and the phase diagram LiSCN – H2O". Journal of Physics and Chemistry of Solids. 160. doi:10.1016/j.jpcs.2021.110299.
  3. ^ Cite error: The named reference di was invoked but never defined (see the help page).