- Phosphorus sesquisulfide
P4S3 Identifiers CAS number PubChem ChemSpider RTECS number TH4330000 Jmol-3D images Image 1 Properties Molecular formula P4S3 Molar mass 220.093 g/mol Appearance yellow, yellow-green or gray solid Density 2.08 g.cm3, solid Melting point
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Depending on purity, samples can appear yellow-green to grey. The compound was discovered by G. Lemoine and first produced safely in commercial quantities in 1898 by Albright and Wilson. It dissolves in an equal weight of carbon disulfide (CS2). Unlike some other phosphorus sulfides, P4S3 is slow to hydrolyze and has a well-defined melting point.
Structure and synthesis
The molecule has C3v symmetry. It is a derivative of the tetrahedral (P4) unit from insertion of sulfur into three P-P bonds. The P-S and P-P distances are 2.090 and 2.235 Å, respectively. P4Se3 and P4S3 adopt the same structures.
Its flash point is about 100 °C.
- ^ a b Leung, Y. C.; Waser, J.; van Houten, S.; Vos, A.; Wiegers, G. A.; Wiebenga, E. H. “The crystal structure of P4S3”. Acta Crystallographica , Volume 10, pages 574-582, year 1957. DOI:10.1107/S0365110X57002042
- ^ Gerhard Bettermann, Werner Krause, Gerhard Riess, Thomas Hofmann “Phosphorus Compounds, Inorganic” in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi: 10.1002/14356007.a19_527
- ^ D. E. C. Corbridge. Phosphorus: An Outline of its Chemistry, Biochemistry, and Technology. 5th Edition. Elsevier: Amsterdam 1995. ISBN 0-444-89307-5. For a discussion of safety matches, see pages 115-116.
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