Triethylborane

Structural formula
General
Surname	Triethylborane
other names	Boron triethyl TEB
Molecular formula	C 6 H 15 B
Brief description	Self-igniting, colorless liquid
External identifiers / databases
CAS number 97-94-9 EC number 202-620-9 ECHA InfoCard 100.002.383 PubChem 7357 Wikidata Q421149
properties
Molar mass	98.00 g mol −1
Physical state	liquid
density	0.696 g cm −3
Melting point	−93 ° C
boiling point	95 ° C
Vapor pressure	51 mbar (20 ° C)
solubility	Hydrolysis in water
Refractive index	1.397 (20 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 250-301-330-314 P: 210-222-231-280-301 + 310-422
Toxicological data	235 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Triethylborane is a chemical compound from the class of organic boron compounds .

Extraction and presentation

Triethylborane can be obtained by reacting borane with ethene . Diborane or a tetrahydrofuran-borane addition product is used as the source for the borane .

properties

Triethylborane is a self-igniting , highly volatile, colorless liquid which is hydrolysed with water. It decomposes when heated. The technical product is also supplied as a solution with tetrahydrofuran , hexane or diethyl ether .

use

Triethylborane is used in the paint industry and in organic synthesis. It is used together with lithium tert- butoxyaluminum hydride for the reductive cleavage of ethers or epoxides . It also deoxidizes primary and secondary alcohols and was used to ignite the JP-7 fuel in the engine and the afterburner on the Lockheed SR-71 ; Due to the chemical properties of the fuel, electrical ignition was not possible, so that the pyrophoric effect between triethylborane and the oxygen in the air is used for ignition.

Individual evidence

1. ↑ ^{a b c d e f g h i j} Entry on triethylborane in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .
2. ↑ ^{a b c} data sheet triethylborane, ≥ 95% from Sigma-Aldrich , accessed on January 28, 2018 ( PDF ).
3. ↑ Joachim Buddrus: Fundamentals of organic chemistry . von Gruyter, 2011, ISBN 978-3-11-024894-4 , p. 172 .
4. ↑ BASF: Alkylborane ( Memento from September 10, 2012 in the web archive archive.today ).
5. ↑ Erwin Riedel , Ralf Alsfasser, Christoph Janiak and Thomas M. Klapötke : Modern Inorganic Chemistry . von Gruyter, 2007, ISBN 978-3-11-019060-1 ( page 593 in the Google book search).
6. ↑ Lockheed SR-71 Blackbird . March Field Air Museum. Archived from the original on January 5, 2014. Retrieved May 5, 2009.