Tris(pentafluorophenyl)borane

Tris(pentafluorophenyl)borane is a highly fluorinated, boron-based Lewis acid significantly stronger than its inorganic counterpart, BF₃. Unlike the pentafluorides of heavier group 15 elements, B(C₆F₅)₃ exhibits no oxidizing properties. Its pronounced electrophilicity and thermal stability make it a versatile reagent, capable of forming stable adducts with neutral and weak Lewis bases, as well as accepting anionic ligands from metal complexes. These attributes render B(C₆F₅)₃ highly valuable in organometallic catalysis, doping of organic semiconductors, and both solution-phase and vapor-phase material fabrication, including thin-film deposition.

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Tris(pentafluorophenyl)borane can be used as:

• A surface passivation material to enhance the performance and stability of perovskite solar cells.
• A p-type dopant and a Lewis acid receptor in poly(3-hexylthiophene) (P3HT)-based organic field-effect transistors (OFETs) for environmental ammonia monitoring.
• A Lewis acid catalyst in the synthesis of advanced siloxane materials via Piers–Rubinsztajn reaction.
• A catalyst in the cyclopropanation of styrenes with aryldiazoacetates to synthesize cyclopropane derivatives under mild conditions.
• A versatile reagent widely used in the preparation of d⁰ arene and other organometallic complexes, useful as polymerization catalysts.
• Used with tri-tert-butylphosphine (570958) to study the heterolytic cleavage of dihydrogen at room temperature and one atmosphere pressure.

A versatile reagent widely used in the preparation of d⁰ arene and other organometallic complexes useful as polymerization catalysts.