Boron trifluoride diethyl etherate for synthesis Synonym: Boron trifluoride ethyl etherate CAS Number 109-63-7. Linear Formula BF 3 · O(C 2 H 5) 2. Molecular Weight 141.93 . Beilstein Registry Number 3909607 . EC Number 203-689-8. MDL number MFCD00013194. PubChem Substance ID 24850505
Chemical formula: BF₃
Use of lumps of solid lithium tetrahydroaluminate, rather than its ethereal solution, and of peroxide-containing boron trifluoride diethyl etherate, rather than the peroxide-free material specified, caused an explosion during the attempted preparation of diborane.
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Boron trifluoride etherate. Boron trifluoride etherate, strictly boron trifluoride diethyl etherate, or boron trifluoride–ether complex, is the chemical compound with the formula BF 3 O(C 2 H 5) 2, often abbreviated BF 3 OEt 2. It is a colorless liquid, although older samples can appear brown.
Appearance: colorless liquid
Boron trifluoride etherate is a fuming liquid. Boron trifluoride etherate may be corrosive to skin, eyes and mucous membranes. Boron trifluoride etherate may be toxic by inhalation. Upon exposure to water Boron trifluoride etherate may emit flammable and corrosive vapors. Boron trifluoride etherate is used as a catalyst in chemical reactions.
Applications. Boron trifluoride diethyl etherate is used as a Lewis acid catalyst in Mukaiyama aldol addition, alkylation, acetylation, isomerization, dehydrations and condensation reactions. It is involved in the prepattion of polyethers in polymerization reactions. As a catalyst, it …
Reactions. Alkylation of a triazole with an aziridine using boron trifluoride etherate as catalyst gave a bicyclic amino ester 〈92TA51〉. Studies show that N -methylindole reacts at the C-3 position of aziridine-2-carboxylates ( 92) and reacts exclusively at the C-2 position of aziridine-2-lactone ( 93 ).