New anilinotropone-based titanium complexes: synthesis, characterization and application as catalysts for olefin polymerization
作者:Mina Mazzeo、Marina Lamberti、Angela Tuzi、Roberto Centore、Claudio Pellecchia
DOI:10.1039/b506079f
日期:——
bimetallic complex 4 was also isolated as a by-product owing to the adventitious presence of moisture. The molecular structures 1-4 of have been determined by single-crystal X-ray diffraction studies. Complexes 1 and 2 are isostructural and exhibit a C2-symmetric octahedral geometry, with a trans(N,N), cis(O,O) arrangement in complex 1, but with a trans(O,O), cis(N,N) arrangement in complex 2. The Cp-mixed
合成并表征了含有2-苯胺基萘配体的新型二氯化钛(IV)配合物。由TiCl4(THF)2与2当量的2-(2,6-二异丙基苯胺基)托酮(L1)和2-(2,3, 4,5,6-五氟苯胺基)托酮(L2)。通过使锂盐与CpTiCl3反应,合成了混合的环戊二烯基-苯胺基萘醌化合物3。由于水分的不定存在,Cp-混合的微-O双金属配合物4也被分离为副产物。的分子结构1-4已经通过单晶X射线衍射研究确定。配合物1和2具有同构结构,并且呈现出C2对称的八面体几何形状,在配合物1中具有反式(N,N),顺式(O,O)排列 但在复合物2中具有反式(O,O),顺式(N,N)排列。Cp混合的复合物3具有扭曲的方形金字塔结构,Cp配体在顶端位置。双金属配合物4对于五配位的钛原子显示出相似的配位几何形状,并且对于第二金属中心显示出伪四面体配位。当用甲基铝氧烷活化时,所有新的配合物在乙烯和丙烯的聚合中均具有活性。