Search results
In the BF 3 affinity scale, Lewis bases' BF 3 affinities are equal to the negative enthalpy change for formation of a solution phase adduct between the base and gaseous BF 3. The reaction is: \[Base(solution) ~+~BF_3(g)~\rightarrow~Base-BF_3(solution)~~~~~- \Delta H~=~\sf{BF_3 ~Affinity}~ \nonumber \]
Boron trifluoride is a versatile Lewis acid that forms adducts with such Lewis bases as fluoride and ethers: CsF + BF 3 → Cs[BF 4] O(CH 2 CH 3) 2 + BF 3 → BF 3 ·O(CH 2 CH 3) 2. Tetrafluoroborate salts are commonly employed as non-coordinating anions.
As a prerequisite for potential comparisons between theoretical and experimental enthalpies of BF 3 adduct formation with bases and adducts in solution (reaction 2), an exploratory analysis of gas-phase data was conducted on seven selected Lewis bases.
Boron trifluoride | BF3 | CID 6356 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
BF 3 supported on silica provides good accessibility for the reactants to the active site and is a mild strength solid acid [72]. Both BF 3 -SiO 2 and nano BF 3 -SiO 2 were found to be efficient mild acid catalysts for the syntheses of heterocyclic compounds.
A more electronegative halide should be able to stabilize the negative charge at $\ce{B}$ in the Lewis acid-base complex better, and this would suggest that $\ce{BF3}$ would be the strongest Lewis acid.
Enthalpy of formation of gas at standard conditions Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific ...
