Bimetallic Coordination Insertion Polymerization of Unprotected Polar Monomers: Copolymerization of Amino Olefins and Ethylene by Dinickel Bisphenoxyiminato Catalysts
作者:Madalyn R. Radlauer、Aya K. Buckley、Lawrence M. Henling、Theodor Agapie
DOI:10.1021/ja4004816
日期:2013.3.13
bisphenoxyiminato complexes based on highly substituted p- and m-terphenyl backbones were synthesized, and the corresponding atropisomers were isolated. In the presence of a phosphine scavenger, Ni(COD)2, the phosphine-ligated syn-dinickel complexes copolymerized α-olefins and ethylene in the presence of amines to afford 0.2-1.3% α-olefin incorporation and copolymerized amino olefins and ethylene with a similar
合成了基于高度取代的对三联苯和间三联苯主链的双苯氧基亚氨基二镍配合物,并分离出相应的阻转异构体。在膦清除剂 Ni(COD)2 的存在下,膦连接的顺丁镍配合物在胺存在下共聚 α-烯烃和乙烯,得到 0.2-1.3% 的 α-烯烃结合和共聚氨基烯烃和乙烯类似的掺入范围(0.1-0.8%)。本刚性催化剂为极性单体的插入聚合提供了一种双金属策略,而不会掩盖杂原子基团。通过比较顺式和反阻转异构体以及对和间三联苯体系,研究了催化剂结构对反应性的影响。