Preparation method of D2 structure hexafluoropropylene dimer

The invention relates to the technical field of chemical processes, in particular to a preparation method of a D2 structure hexafluoropropylene dimer. According to the preparation method of the D2 structure hexafluoropropylene dimer, 5-bromine-6-sulfydryl pyridine and vinyl trifluoroborate are subjected to a sulfydryl-alkene reaction, the prepared auxiliary is added into metal fluoride, the valence state of metal can be stabilized, the catalytic activity can be improved, and high dispersion of active components in a fluorine-containing catalyst is achieved. 该发明涉及化学工艺技术领域，具体关于一种D2结构六氟丙烯二聚体的制备方法；该发明提供一种D2结构六氟丙烯二聚体的制备方法，该方法通过5-溴-6-巯基吡啶，乙烯基三氟硼酸酯进行巯基-烯反应，制备得到的助剂加入到金属氟化物中，可以稳定金属的价态，提高催化活性，实现活性组分在含氟催化剂中的高度分散。