Boron trisulfide
Crystal structure | |||||||||||||||||||
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__ B 3+ __ S 2− | |||||||||||||||||||
General | |||||||||||||||||||
Surname | Boron trisulfide | ||||||||||||||||||
other names |
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Ratio formula | B 2 S 3 | ||||||||||||||||||
Brief description |
pale yellowish solid |
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properties | |||||||||||||||||||
Molar mass | 117.80 g mol −1 | ||||||||||||||||||
Physical state |
firmly |
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density |
1.7 g cm −3 |
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Melting point |
563 ° C |
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safety instructions | |||||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Boron trisulfide is an inorganic chemical compound of boron from the group of sulfides .
Extraction and presentation
Boron trisulfide can be obtained by reacting boron with hydrogen sulfide .
properties
Boron trisulfide is a pale yellowish solid which is extremely sensitive to hydrolysis. The amorphous form has no defined melting point and begins to sublime at around 300 ° C. It also reacts with alcohols, amines and mercaptans . With more sulfur, the compound reacts at 300 ° C to form boron disulfide BS 2 , which is made up of B 8 S 16 molecules and whose structure is closely related to that of porphine .
use
Boron trisulfide is used for organic synthesis. It reduces sulfoxides to thiols and reacts with ketones to form thioketones .
Individual evidence
- ↑ a b c d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 804.
- ^ A b William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–53 ( limited preview in Google Book Search).
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ A b Wiley-VCH: Ullmann's Fine Chemicals . John Wiley & Sons, 2013, ISBN 978-3-527-68357-4 , pp. 351 ( limited preview in Google Book Search).
- ^ Peter Paetzold: Chemistry: An introduction . Walter de Gruyter, 2009, ISBN 3-11-020268-9 , p. 772 ( limited preview in Google Book search).