Boron Trifluoride Etherate

Title: Boron Trifluoride Etherate
CAS Registry Number: 109-63-7
CAS Name: Boron fluoride ethyl ether
Additional Names: boron fluoride etherate; ethyl ether-boron trifluoride complex
Molecular Formula: C4H10BF3O
Molecular Weight: 141.93
Percent Composition: C 33.85%, H 7.10%, B 7.62%, F 40.16%, O 11.27%
Line Formula: (CH3CH2)2O.BF3
Literature References: Prepd by vapor-phase reaction of anhydr ether with BF3: Laubengayer, Finlay, J. Am. Chem. Soc. 65, 884 (1943).
Properties: Fuming liquid, immediately hydrolyzed by moisture in air. d425 1.125. bp 125.7°. mp -60.4°. nD20 1.348. Heat of formation: 12.5 kcal. Heat of soln at 0° in ether: 2.7 kcal.
Melting point: mp -60.4°
Boiling point: bp 125.7°
Index of refraction: nD20 1.348
Density: d425 1.125
CAUTION: On decomposition forms highly toxic fumes of fluorides.
Use: Catalyst in acetylation, alkylation, polymerization, dehydration, and condensation reactions.
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