[Sb(CF)][B(CF)]: an air stable, Lewis acidic stibonium salt that activates strong element-fluorine bonds. Academic Article uri icon


  • As part of our ongoing interest in main group Lewis acids for fluoride anion complexation and element-fluorine bond activation, we have synthesized the stibonium borate salt [Sb(C6F5)4][B(C6F5)4] (3). The perfluorinated stibonium cation [Sb(C6F5)4](+) present in this salt is a potent Lewis acid which abstracts a fluoride anion from [SbF6](-) and [BF(C6F5)3](-) indicating that it is a stronger Lewis acid than SbF5 and B(C6F5)3. The unusual Lewis acidic properties of 3 are further reflected by its ability to polymerize THF or to promote the hydrodefluorination of fluoroalkanes in the presence of Et3SiH. While highly reactive in solution, 3 is a perfectly air stable salt, making it a convenient Lewis acidic reagent.

published proceedings

  • J Am Chem Soc

altmetric score

  • 1

author list (cited authors)

  • Pan, B., & Gabbai, F. P.

citation count

  • 100

complete list of authors

  • Pan, Baofei||Gabbaiï, François P

publication date

  • July 2014