Boron trifluoride diethyl etherate

Structural formula
General
Surname	Boron trifluoride diethyl etherate
other names	Boron trifluoride etherate; Boron trifluoride etherate; Diethyl ether trifluoroborane; Diethyl ether boron trifluoride;
Molecular formula	BF 3 OEt 2
Brief description	yellow, pungent smelling liquid
External identifiers / databases
EC number	203-689-8
ECHA InfoCard	100.003.355
PubChem	8000
Wikidata	Q10866254
properties
Molar mass	141.93 g · mol -1
Physical state	liquid
density	1.12 g cm −3
Melting point	−58 ° C
boiling point	126 ° C
Vapor pressure	2.7 hPa (20 ° C)
solubility	reacts violently with water
safety instructions
H and P phrases	H: 226-314-332-372
	P: 210-280-301 + 330 + 331-305 + 351 + 338-308 + 310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Boron trifluoride diethyl etherate is a complex compound (Lewis acid-base adduct), consisting of diethyl ether (Lewis base, electron pair donor) and boron trifluoride (46%) (Lewis acid, electron pair acceptor). The yellow, pungent smelling liquid smokes in air as a result of hydrolysis, is highly flammable and corrosive.

Extraction and presentation

Boron trifluoride diethyl etherate can be obtained by gas phase reaction between BF ₃ and anhydrous diethyl ether .

use

Boron trifluoride diethyl etherate is used in Friedel-Crafts acylations and alkylations .

Boron trifluoride diethyl etherate is used as a depolymerization reagent for the depolymerization of polysiloxanes ( silicones ). In this process, monomers are generated from the polymers , which can be reassembled into polymers in a subsequent polymerisation so that polysiloxanes can be recycled ( chemical recycling ).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on boron trifluoride diethyl etherate in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .
↑ Data sheet Boron trifluoride diethyl etherate from Sigma-Aldrich , accessed on January 17, 2014 ( PDF ).
↑ Peter Döhlert, Johannes Pfrommer, Stephan Enthaler: Recycling Concept for End-of-Life Silicones: Boron Trifluoride Diethyl Etherate as Depolymerization Reagent to Produce Difluorodimethylsilane as Useful Commodity . In: ACS Sustainable Chemistry & Engineering . tape 3 , no. 1 , January 5, 2015, p. 163-169 , doi : 10.1021 / sc500666d .

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on boron trifluoride diethyl etherate in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .

[Sigma-2] Data sheet Boron trifluoride diethyl etherate from Sigma-Aldrich , accessed on January 17, 2014 ( PDF ).

[3] Peter Döhlert, Johannes Pfrommer, Stephan Enthaler: Recycling Concept for End-of-Life Silicones: Boron Trifluoride Diethyl Etherate as Depolymerization Reagent to Produce Difluorodimethylsilane as Useful Commodity . In: ACS Sustainable Chemistry & Engineering . tape 3 , no. 1 , January 5, 2015, p. 163-169 , doi : 10.1021 / sc500666d .