Tribromosilane

Structural formula
General
Surname	Tribromosilane
Molecular formula	SiHBr 3
Brief description	colorless liquid
External identifiers / databases
CAS number 7789-57-3 EC number 232-175-6 ECHA InfoCard 100.029.250 PubChem 82244 Wikidata Q7840448
properties
Molar mass	268.81 g mol −1
Physical state	liquid
density	2.7 g cm −3
Melting point	−73.5 ° C
boiling point	111.8 ° C
Vapor pressure	8.8 Torr (0 ° C)
solubility	Decomposes in water and alkalis
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tribromosilane is a chemical compound from the group of silanes .

Extraction and presentation

Tribromosilane can be obtained by reacting silicon with hydrogen bromide . This process was described as early as 1857 during the first synthesis by Friedrich Wöhler and Heinrich Buff .

${\displaystyle \mathrm {Si+3\ HBr\longrightarrow SiHBr_{3}+H_{2}} }$

properties

Tribromosilane is a colorless, easily mobile liquid that smokes heavily in air and hydrolyses to silicon oxide hydride and hydrogen bromide in cold water . It ignites easily in air.

Individual evidence

1. ↑ ^{a b c d e f g} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 685.
2. ^ ^{A b c} Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 724–725 ( limited preview in Google Book search).
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ↑ H. Buff, F. Wöhler: About new compounds of silicon . In: Annals of Chemistry and Pharmacy . tape 104 , no. 1 , 1857, pp. 94-109 , doi : 10.1002 / jlac.18571040108 .