Tungsten trisulfide

Last updated
Tungsten trisulfide
Names
Other names
Tungsten(VI) sulphide, tris(sulfanylidene)tungsten
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 235-734-2
PubChem CID
  • InChI=1S/3S.W
    Key: YMZATHYBBBKECM-UHFFFAOYSA-N
  • S=[W](=S)=S
Properties
WS3
Molar mass 280.038 g/mol
AppearanceBrown solid
Related compounds
Related compounds
 Tungsten disulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Tungsten trisulfide is an inorganic compound of tungsten and sulfur with the chemical formula WS3. [1] [2] The compound looks like chocolate-brown powder. [3] [4]

Contents

Synthesis

1. Bubbling hydrogen sulfide through hot acidified solution of tungstenates. [5]

2. Reaction of tungsten disulfide and elemental sulfur on heating: [6]

WS2 + S → WS3

3. Precipitates upon acidification of thiotungstate solutions: [5]

(NH4)2WS4 + HCl → WS3 + 2 NH4Cl + H2S
Na2WS4 + H2SO4 → WS3 + Na2SO4 + H2S

Physical properties

Slightly soluble in cold water and forms colloidal solution in hot water.

Soluble in alkali metal carbonates and alkali metal hydroxides. [3]

Chemical properties

Tungsten trisulfide can be decomposed by heating into tungsten disulfide and elemental sulfur:

WS3 → WS2 + S

Reacts with sulfide solutions:

WS3 + (NH4)2S → (NH4)2WS4

Reduced by hydrogen:

WS3 + 3H2 → W + 3 H2S

References

  1. ↑ Scott, Robert A.; Jacobson, Allan J.; Chianelli, Russ R.; Pan, W. H.; Stiefel, Edward I.; Hodgson, Keith O.; Cramer, Stephen P. (1 April 1986). "Reactions of molybdenum trisulfide, tungsten trisulfide, tungsten triselenide, and niobium triselenide with lithium. Metal cluster rearrangement revealed by EXAFS" . Inorganic Chemistry . 25 (9): 1461–1466. doi:10.1021/ic00229a032. ISSN   0020-1669 . Retrieved 1 November 2021.
  2. ↑ Hille, Russ; Schulzke, Carola; Kirk, Martin L. (29 September 2016). Molybdenum and Tungsten Enzymes: Bioinorganic Chemistry. Royal Society of Chemistry. p. 155. ISBN   978-1-78262-877-4 . Retrieved 1 November 2021.
  3. 1 2 Kirk-Othmer Concise Encyclopedia of Chemical Technology, 2 Volume Set. John Wiley & Sons. 16 July 2007. p. 1122. ISBN   978-0-470-04748-4 . Retrieved 1 November 2021.
  4. ↑ "Tungsten trisulfide". National Institute of Standards and Technology . Retrieved 1 November 2021.
  5. 1 2 Zelikman, A. N.; Krein, O. E.; Samsonov, G. V. (1966) [1964]. Belyaevskaya, L. V. (ed.). Metallurgiya redkikh metallov [Metallurgy of Rare Metals]. Israel Program for Scientific Translations. Translated by Aladjem, A. (2nd ed.). Jerusalem: S. Monson / Wiener Bindery. p. 7. Retrieved 1 November 2021– via Google Books.
  6. ↑ "Tungsten Trisulfide-- Tungsten Trisulfide Professional Manufacturer and Supplier". tungsten-powder.com. Retrieved 1 November 2021.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.