sˈɪmɪlɚli, ðeɪ ˈoʊnli ʃˈoʊ ɹɪɐktˈɪvᵻɾi wɪððə stɹˈɔŋɡɪst ʌv ɪlˌɛktɹoʊfˈɪlɪk ɹɪˈeɪdʒənts ˈiː.dʒˈiː., daɪˈɑːksɚɹˌeɪnz ænd sˈɔlts kəntˈeɪnɪŋ ðɪ ˌɛnˈɛf fˈoːɹ plˈʌs kˈæɾaɪən.
Similarly, they only show reactivity with the strongest of electrophilic reagents (e.g., dioxiranes and salts containing the NF4+ cation).