Control of Stereochemistry in Cyclopolymerization of Dienes Using New Symmetrical Palladium Catalyst

我们将具有非对称或低对称结构的钯催化剂用于烯烃、二烯和三烯的聚合。 该配合物促进了末端二烯和双末端三烯的环化聚合，得到了具有沿着聚合物的环状结构的聚合物。 催化剂的结构影响聚合反应的立体化学，低对称结构的催化剂也提供了受调控的聚合物。 我们研究了由大环配体支撑的二钯配合物的合成及其作为几种单体的聚合的用途。 虽然配合物对二烯烃的环化聚合反应催化效果不佳，但烯烃的聚合反应以及烯烃与极性单体的共聚反应都产生了新的聚合物合成反应。 该共聚反应提供了具有高杨氏模量的弹性体聚合物材料。

We used the palladium catalyst having non- or low-symmetrical structures for polymerization of olefins, dienes, and trienes. Cyclopolymerization of terminal dienes and bis-terminal trienes were promoted by the complexes and yielded the polymers having cyclic structures along the polymers in a regulated form. The stereochemistry of the polymerization is influenced by the structures of the catalysts, and low-symmetrical structure catalyst also provided the regulated polymers. We examined synthesis of the dipalladium complexes supported by a macrocyclic ligand and their use as the polymerization of several monomers. Although the cyclopolymerization of diene was not well catalyzed by the complexes, polymerization of olefins and copolymerization of olefins with polar monomers resulted in new polymer synthetic reactions. The copolymerization afforded elastomeric polymer materials with high Young's modulus.