Perfluoro-1,1-diphenylethane heated with SbF₅ at 130 °C with further treatment of the reaction mixture with HF-pyridine and then with water, gave perfluorinated 9‐methylfluorene and 9-methyl-1,2,3,4-tetrahydrofluorene. Perfluoro-1,1-diphenylpropane under similar conditions formed perfluoro-9-ethylfluorene and perfluoro-9,9-dimethyl-1,2,3,4-tetrahydrofluorene. When perfluoroisobutylbenzene was heated with pentafluorobenzene in SbF₅ medium at 130 °C, with further treatment of the reaction mixture with HF-pyridine and then with water, perfluoro-9-isopropylfluorene was obtained. Perfluorodiphenylmethane heated with SbF₅, after treatment of the reaction mixture with water, gave perfluorobenzophenone; perfluorofluorene or its derivatives were not found in the mixture.

全氟-1,1-二苯乙烷与SbF ₅在130°C加热，并将反应混合物先后用HF-吡啶和水处理，得到全氟9-甲基芴和9-甲基-1,2,3,4-四氢芴。全氟-1，1-二苯基丙烷在相似条件下形成全氟-9-乙基芴和全氟-9，9-二甲基-1，2，3，4-四氢芴。当将全氟异丁苯与五氟苯在SbF ₅介质中于130°C加热时，先用HF-吡啶，然后用水进一步处理反应混合物，得到全氟-9-异丙基芴。用SbF ₅加热的全氟二苯甲烷用水处理反应混合物后，得到全氟二苯甲酮。在混合物中未发现全氟芴或其衍生物。