Selenium hexasulfide
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| Template:Longitem | Template:Chem2 |
| Molar mass | Template:Chem molar mass |
| Appearance | orange needles |
| Density | 2.44 g/cm3 |
| Melting point | Template:Chembox CalcTemperatures |
| Solubility | soluble in carbon disulfide |
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Selenium hexasulfide is a chemical compound with the chemical formula Template:Chem2. Its molecular structure is an 8-membered ring, consisting of two selenium and six sulfur atoms (diselenacyclooctasulfane), analogous to the Template:Chem2 ring, an allotrope of sulfur (cyclooctasulfur or cyclooctasulfane), and other 8-membered rings of selenium sulfides with formula Template:Chem2.[2]
There are several isomers depending on the relative placement of the selenium atoms in the ring: 1,2-diselenacyclooctasulfane (with the two Se atoms adjacent), 1,3-diselenacyclooctasulfane, 1,4-diselenacyclooctasulfane, and 1,5-diselenacyclooctasulfane (with the Se atoms opposite).[3] It is an oxidizing agent.
The 1,2 isomer can be prepared by reaction of chlorosulfanes and dichlorodiselane with potassium iodide in carbon disulfide. The reaction produces also cyclooctaselenium Template:Chem2 and all other eight-member cyclic selenium sulfides, except selenacyclooctasulfane Template:Chem2, and several six- and seven-membered rings.[2]
References
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- ↑ a b Risto S. Laitinen, Pentti Pekone, Yrjö Hiltunen and Tapanin A. Pakkanen (1989), "The 77S NMR spestroscopic Identification of Heterocyclic Selenium Sulfides Prepared by the Reactions of Chlorosulfanes and Dichlorodiselane with Potassium Iodide". Acta Chemica Scandinavica, volume 43, pages 436-440. Script error: No such module "CS1 identifiers".
- ↑ Arto Maaninen, Tristram Chivers, Masood Parvez, Jarkko Pietikäinen, and Risto S. Laitinen (1999), "Syntheses of THF Solutions of SeX2 (X = Cl, Br) and a New Route to Selenium Sulfides SenS8−n (n = 1−5): X-ray Crystal Structures of SeCl2(tht)2 and SeCl2·tmtu". Inorganic Chemistry, volume 38, issue 18, pages 4093–4097. Script error: No such module "CS1 identifiers".
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