Trifluorosilane

Structural formula
General
Surname	Trifluorosilane
Molecular formula	SiHF 3
Brief description	colorless gas
External identifiers / databases
CAS number 13465-71-9 PubChem 139462 Wikidata Q16707512
properties
Molar mass	86.09 g mol −1
Physical state	gaseous
density	3.52 g l −1
Melting point	−131 ° C
boiling point	−95 ° C
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 .

Trifluorosilane is a chemical compound from the group of silanes .

Extraction and presentation

Trifluorosilane can be obtained by reacting trichlorosilane with antimony (III) fluoride , zinc (II) fluoride or titanium (IV) fluoride .

${\displaystyle \mathrm {SiHCl_{3}+SbF_{3}\longrightarrow SiHF_{3}+SbCl_{3}} }$

${\displaystyle \mathrm {4\ SiHCl_{3}+3\ TiF_{4}\longrightarrow 4\ SiHF_{3}+3\ TiCl_{4}} }$

The compound can also be obtained from difluorosilane by pyrolysis . It was first portrayed by Otto Ruff at the beginning of the 20th century .

properties

Trifluorosilane is a colorless, flammable gas that hydrolyzes with water and slowly decomposes even at room temperature. When heated to 400 ° C, it rapidly breaks down into hydrogen , silicon and tetrafluorosilane . It decomposes alcohol and ether and reduces concentrated nitric acid . It forms an explosive gas mixture with air.

Individual evidence

1. ↑ ^{a b c d e} William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2016, ISBN 978-1-4398-8050-0 , pp. 87 ( limited preview in Google Book search).
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ↑ ^{a b} 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. 254.
4. ^ CC Addison: Inorganic Chemistry of the Main-Group Elements . Royal Society of Chemistry, 1973, ISBN 0-85186-752-9 , pp. 188 ( limited preview in Google Book search).
5. ^ Leopold Gmelin: Silicon: Supplement volume . Springer-Verlag, 1996, ISBN 3-540-93728-5 , pp. 82 ( limited preview in Google Book search).
6. ↑ Theodore M. Besmann: Proceedings of the Thirteenth International Conference on Chemical Vapor Deposition . The Electrochemical Society, 1996, ISBN 1-56677-155-2 , pp. 203 ( limited preview in Google Book search).
7. ↑ Helmut Werner: History of inorganic chemistry The development of a science in Germany from Döbereiner to today . John Wiley & Sons, 2016, ISBN 978-3-527-33907-5 , pp. 38 ( limited preview in Google Book search).