Steric and Electronic Effects in Ethene/Norbornene Copolymerization by Neutral Salicylaldiminato-Ligated Palladium(II) Catalysts
作者:Frances Y. Pong、Sukhendu Mandal、Ayusman Sen
DOI:10.1021/om500470t
日期:2014.12.22
Three palladium(II) catalysts, ligated with naphthoxyimine ligands, were synthesized, structurally characterized, and used to copolymerize ethene with norbornene derivatives. Results show that modification of the functional group on the 8-carbon of the naphthol ligand can significantly influence polymer composition and structure. The three functional groups on the 8-carbon studied were −H (catalyst
合成了三种与萘氧基亚胺配体连接的钯(II)催化剂,对其结构进行了表征,并用于使乙烯与降冰片烯衍生物共聚。结果表明,萘酚配体的8-碳上的官能团的修饰可显着影响聚合物的组成和结构。研究的8碳上的三个官能团是-H(催化剂A),-OH(催化剂B)和-OCH 3(催化剂C)。在这三种催化剂中,A对乙烯/ 5-正丁基-2-降冰片烯和乙烯/ 5-正己基-2-降冰片烯的共聚反应活性最高。催化剂A生产的共聚物的分子量明显高于B或C产生的那些。既阿和乙也能够产生明显量的乙烯/叔丁基其含有降冰片烯官能化的30%以上5-降冰片烯-2-羧酸酯共聚物。与A和B相反,C不能使官能化的降冰片烯和乙烯共聚。