It has been described as the “ideal Lewis acid” because of its high thermal stability and the relative inertness of the B-C bonds. Related fluoro-substituted boron compounds, such as those containing  groups, decompose with formation of B-F bonds. Tris(pentafluorophenyl)borane is thermally stable at temperatures well over 200 °C, resistant to oxygen, and water-tolerant.
It has been characterized as an “ideal Lewis acid” due to its high thermal stability and the relative inertness of the B-C bonds. Related fluorinated boron compounds, such as those containing F groups, decompose through the formation of B-F bonds. Tris(pentafluorophenyl)borane exhibits excellent thermal stability at temperatures significantly above 200 °C, resistant to oxygen and water.