Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
Dalton Trans. 2018 Jun 25;47(25):8264-8267. doi: 10.1039/c8dt01018h.
The phosphine phosphonic amide ligand platform is highly versatile, with three positions that can be independently tuned. In this contribution, we wish to study the nickel complexes based on this ligand system. Interestingly, the nickel dibromide and nickel allyl complexes are not active in ethylene polymerization. In contrast, the nickel phenyl chloride complexes are highly active in ethylene polymerization in the presence of a sodium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate cocatalyst. In addition, these nickel complexes can initiate ethylene copolymerizations with polar functionalized comonomers including methyl 10-undecenoate, 6-chloro-1-hexene and 5-acetoxy-1-pentene. More interestingly, these nickel complexes can oligomerize 1-hexene and 6-chloro-1-hexene.
膦亚膦酰胺配体平台具有高度的通用性，有三个位置可以独立调节。在本研究中，我们希望研究基于该配体系统的镍配合物。有趣的是，镍二溴化物和镍烯丙基配合物在乙烯聚合中没有活性。相比之下，镍苯基氯化物配合物在四（3,5-双（三氟甲基）苯基）硼酸钠助催化剂存在下具有很高的乙烯聚合活性。此外，这些镍配合物可以引发包括甲基 10-十一烯酸酯、6-氯-1-己烯和 5-乙酰氧基-1-戊烯在内的极性官能化共聚单体的乙烯共聚。更有趣的是，这些镍配合物可以使 1-己烯和 6-氯-1-己烯齐聚。
