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以Pd-Al_2O_3(1%)催化氢化全氟丙烯二聚体4和5均可得到混合的氢化产物。由4主要得到加氧产物7;由5主要得到脱去氟化氢再加氢的产物8。四氟乙烯四聚体6氢化后可得到混合产物9a和9b,它们是氢化后失去一分子氟化氢的含氟烯烃。上述氢化产物先经制备色谱分离制备,再经1~H和(19)~F核磁共振、红外、质谱等分析,证明了结构。上述催化剂不能催化氢化四氟乙烯的五聚体。
Hydrogenation of the perfluorinated propylene dimers 4 and 5 with Pd-Al 2 O 3 (1%) catalyzed hydrogenation can give mixed hydrogenation products. The major oxygenated product 7 was obtained from 4; the major hydrogenated product of hydrogen fluoride was removed from 5 Tetrafluoroethylene tetramer 6 is hydrogenated to provide mixed products 9a and 9b, which are fluoroolefins that have been hydrogenated to lose one molecule of hydrogen fluoride. The above hydrogenated products were separated by preparative chromatography. The structures were confirmed by 1 H and 19 F NMR, IR and MS. The above catalysts do not catalyze the hydrogenation of pentamers of tetrafluoroethylene.