Chemistry:Tungsten trisulfide
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Tungsten(VI) sulphide, tris(sulfanylidene)tungsten
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3D model (JSmol)
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| Properties | |
| WS3 | |
| Molar mass | 280.038 g/mol |
| Appearance | Brown solid |
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Related compounds
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Tungsten disulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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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]
Synthesis
- Bubbling hydrogen sulfide through hot acidified solution of tungstenates.[5]
- Reaction of tungsten disulfide and elemental sulfur on heating:[6] [math]\ce{ WS2 + S -> WS3 }[/math]
- Precipitates upon acidification of thiotungstate solutions:[5] [math]\ce{ (NH4)2WS4 + HCl -> WS3 + 2NH4Cl + H2S }[/math] [math]\ce{ Na2WS4 + H2SO4 -> WS3 + Na2SO4 + H2S }[/math]
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: [math]\ce{ WS3 -> WS2 + S }[/math]
Reacts with sulfide solutions: [math]\ce{ WS3 + (NH4)2S -> (NH4)2WS4 }[/math]
Reduced by hydrogen: [math]\ce{ WS3 + 3H2 -> W + 3H2S }[/math]
References
- ↑ 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. https://pubs.acs.org/doi/abs/10.1021/ic00229a032. Retrieved 1 November 2021.
- ↑ Hille, Russ; Schulzke, Carola; Kirk, Martin L. (29 September 2016) (in en). Molybdenum and Tungsten Enzymes: Bioinorganic Chemistry. Royal Society of Chemistry. p. 155. ISBN 978-1-78262-877-4. https://books.google.com/books?id=FRU0DQAAQBAJ&dq=Tungsten+trisulfide&pg=PA155. Retrieved 1 November 2021.
- ↑ 3.0 3.1 (in en) Kirk-Othmer Concise Encyclopedia of Chemical Technology, 2 Volume Set. John Wiley & Sons. 16 July 2007. p. 1122. ISBN 978-0-470-04748-4. https://books.google.com/books?id=BYQfEAAAQBAJ&dq=Tungsten+trisulfide&pg=RA1-PA1122. Retrieved 1 November 2021.
- ↑ "Tungsten trisulfide" (in en). National Institute of Standards and Technology. https://webbook.nist.gov/cgi/formula?ID=B8025276.
- ↑ 5.0 5.1 Zelikman, A. N.; Krein, O. E.; Samsonov, G. V. (1966). Belyaevskaya, L. V.. ed. Metallurgiya redkikh metallov. Israel Program for Scientific Translations (2nd ed.). Jerusalem: S. Monson / Wiener Bindery. p. 7. https://books.google.com/books?id=zUwjAAAAMAAJ. Retrieved 1 November 2021.
- ↑ "Tungsten Trisulfide-- Tungsten Trisulfide Professional Manufacturer and Supplier". tungsten-powder.com. http://www.tungsten-powder.com/tungsten-trisulfide.html.
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