Boron triiodide
Structural formula | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
General | ||||||||||||||||
Surname | Boron triiodide | |||||||||||||||
other names |
Triiodoborane |
|||||||||||||||
Molecular formula | BI 3 | |||||||||||||||
Brief description |
colorless solid |
|||||||||||||||
External identifiers / databases | ||||||||||||||||
|
||||||||||||||||
properties | ||||||||||||||||
Molar mass | 391.52 g mol −1 | |||||||||||||||
Physical state |
firmly |
|||||||||||||||
density |
3.35 g cm −3 |
|||||||||||||||
Melting point |
49.9 ° C |
|||||||||||||||
boiling point |
209.5 ° C |
|||||||||||||||
solubility |
|
|||||||||||||||
safety instructions | ||||||||||||||||
|
||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Boron triiodide is a chemical compound from the group of boron - halogen compounds or inorganic iodine compounds .
Extraction and presentation
Boron triiodide can be obtained by the reaction of lithium borohydride with iodine, whereby lithium iodide , hydrogen and hydrogen iodide are formed in addition to boron triiodide .
properties
In the pure state, boron triiodide forms colorless, otherwise reddish, shiny crystals that are sensitive to air and hydrolysis and have a hexagonal crystal structure (a = 699.09 ± 0.02 pm, c = 736.42 ± 0.03 pm, space group P 6 3 / m (room group no. 176) ). Boron triiodide is a strong Lewis acid and is soluble in carbon disulfide .
Boron triiodide reacts with water to form boric acid and hydriodic acid :
use
Boron triiodide can be used for the production of other chemical compounds and as a catalyst (for example in coal liquefaction).
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 II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 .
- ↑ a b c d data sheet Boron triiodide, 95% from Sigma-Aldrich , accessed on December 1, 2019 ( PDF ).
- ↑ a b Lide, DR, ed. (2005), CRC Handbook of Chemistry and Physics (86th ed.), Boca Raton (FL): CRC Press, ISBN 0-8493-0486-5 .
- ↑ Bernd Stange: Contributions to the chemistry of boron-nitrogen compounds ( Memento from September 23, 2010 in the Internet Archive ) (PDF; 1.2 MB), dissertation University of Bochum 2001.
- ↑ Barbara Albert, Konny Schmitt: The crystal structure of boron triiodide, BI 3 . In: Journal for inorganic and general chemistry , Volume 627 Issue 5, pp. 809-810; doi : 10.1002 / 1521-3749 (200105) 627: 5 <809 :: AID-ZAAC809> 3.0.CO; 2-J .
- ↑ Thorsten Harald Klawonn: Low molecular organometallic gelators deoxyamino sugar carbene complexes and cholesterol titanocene , dissertation University of Bonn, 2008 DNB 991806476/34 .
- ↑ Hydrogenation in the presence of borane and iodine catalysts paves the way for the liquefaction of lean coal (innovations report)
Web links
- Entry on boron triiodide . In: P. J. Linstrom, W. G. Mallard (Eds.): NIST Chemistry WebBook, NIST Standard Reference Database Number 69 . National Institute of Standards and Technology , Gaithersburg MD