Titanium(<scp>iv</scp>) catalysts with ancillary imino-spiroketonato ligands: synthesis, structure and olefin polymerization
作者:Yuguo Ma、Emil B. Lobkovsky、Geoffrey W. Coates
DOI:10.1039/c5dt01104c
日期:——
New titanium(IV) complexes having two bidentate β-iminoethyl-spiro[4,5]decan-6-onato ligands with various N-aryl substituents have been synthesized. X-ray crystal structure analysis reveals that these titanium complexes all exhibit a C2-symmetric conformation with a distorted octahedral geometry, although the specific orientation of the ligands around the titanium center varies with the identity of
合成了具有两个具有各种N-芳基取代基的二齿β-亚氨基乙基-螺环[4,5] decan-6-onato配体的新型钛(IV)配合物。X射线晶体结构分析表明,这些钛配合物都显示出具有扭曲的八面体几何形状的C 2对称构象,尽管围绕钛中心的配体的具体取向随N的身份而变化。-芳基部分。在用甲基铝氧烷(MAO)活化后,这些络合物催化乙烯和丙烯的聚合。在乙烯的情况下,大多数配合物表现出0℃至25℃之间的活性聚合的特征,从而产生具有窄的分子量分布和数均分子量高达100000g / mol的聚乙烯。取决于N-芳基取代基,丙烯的聚合产生的立构规整度范围从略间同立构到略等规立构的产物。