Synthesis and Characterization of Tridentate Nickel Complexes Bearing P<sup>∧</sup>N<sup>∧</sup>N and P<sup>∧</sup>N<sup>∧</sup>P Ligands and Their Catalytic Property in Ethylene Oligomerization
作者:Junxian Hou、Wen-Hua Sun、Shu Zhang、Hongwei Ma、Yuan Deng、Xiaoming Lu
DOI:10.1021/om0507979
日期:2006.1.1
A series of nickel(II) complexes ligated by the N-(1-(2-(diarylphosphino)phenyl)methylidene)quinolin-8-amines (P∧N∧N) and 2-(diphenylphosphino)-N-[2-(diarylphosphino)benzylidene]anilines (P∧N∧P) were synthesized and characterized by elemental analysis, spectroscopy, and X-ray crystallography. X-ray crystallographic analyses reveal complexes 16 and 20 as having a five-coordinated distorted trigonal-bipyramidal
一系列镍(II)配合物通过连接Ñ - (1-(2-(二芳基膦)苯基)亚甲基)喹啉-8-胺(P ∧ Ñ ∧ N)和2-(二苯基膦基) - ñ - [2- (二芳基膦)亚苄基]苯胺(P ∧ ñ ∧ P)被合成和表征通过元素分析,光谱和X-射线晶体学。X射线晶体学分析表明,配合物16和20具有五坐标扭曲的三角-双锥体几何形状,而配合物12显示出扭曲的正方形-锥体几何形状,而配合物13则是扭曲的正方形平面。用MAO和AlEtCl 2激活后,这些配合物表现出相当高的乙烯低聚活性(高达1.34×10 6 g·mol - 1(Ni)·h - 1)。发现配体环境和反应条件显着影响催化剂的活性。另外,研究了具有扭曲的四面体配位几何形状的钴类似物,其显示出低的乙烯低聚活性。