kəmpˈɛɹd wɪð ɐ tˈoːɹʃənəl ˈæŋɡəl ʌv fˈɪfti sˈɪks.ˈeɪt fˈoːɹ dᵻɡɹˈiːz fɔːɹ , wˌɪtʃ ɪz ɐ stɹˈɔŋɡɚ lˈuːɪs ˈæsɪd ðɐn bˌiːsˌiːˈɛf, ðɪs ʃˈoʊz ðæt ðɛɹ ɪz sˌʌm dᵻlˌɑːkəlᵻzˈeɪʃən ʌv ᵻlˈɛktɹɑːn dˈɛnsᵻɾi fɹʌmðə pˈæɹəflˈʊɹɹiːn ˈæɾəmz tə ðə bˈoːɹɑːn ˈæɾəm ðæt ɹᵻdˈuːsᵻz ɪts æsˈɪdᵻɾi.
Compared with a torsional angle of 56.8(4)° for , which is a stronger Lewis acid than BCF, this shows that there is some delocalization of electron density from the para-fluorine atoms to the boron atom that reduces its acidity.