Synthesis of Titanium, Zirconium, and Hafnium Complexes that Contain Diamido Donor Ligands of the Type [(t-BuN-o-C<sub>6</sub>H<sub>4</sub>)<sub>2</sub>O]<sup>2</sup><sup>-</sup> and an Evaluation of Activated Versions for the Polymerization of 1-Hexene
作者:Richard R. Schrock、Robert Baumann、Steven M. Reid、Jonathan T. Goodman、Rüdiger Stumpf、William M. Davis
DOI:10.1021/om9905005
日期:1999.8.1
Titanium, zirconium, and hafnium dialkyl complexes that contain the [(t-Bu-d6−N-o-C6H4)2O]2- ([t-BuNON]2-) ligand have been prepared. Only [t-BuNON]TiMe2 could be isolated, but [t-BuNON]ZrR2 and [t-BuNON]HfR2 complexes could be isolated in which (for example) R = Me, Et, or i-Bu. X-ray studies showed [t-BuNON]MMe2 structures (M = Ti or Zr) to be of the “twisted fac” variety in which two amido nitrogens
包含[(叔BU-钛,锆,和铪二烷基配合物d 6 -NoC 6 ħ 4)2 O] 2 -([叔BuNON] 2 - )配位体已经制备。仅可以分离出[t-BuNON] TiMe 2,但是可以分离出[t-BuNON] ZrR 2和[t-BuNON] HfR 2络合物,其中(例如)R = Me,Et或i-Bu。透视研究表明[叔BuNON] MME 2层的结构(M = Ti或Zr)是“扭曲的FAC在两个扭曲的三角锥体中,两个酰胺基氮占据赤道位置的变种。但是,在溶液中,所有这些物质在NMR时间尺度上均显示同等的烷基,这是由于形成了含有平面氧供体的中间单体结构所致。在包含类似的复合物[我(CD 3)2 CNC 6 ħ 4 ] [我(CD 3)2 CN-2,4-ME 2 c ^ 6 ħ 2 ] O} 2 -或[我(CD 3)2 CNC 6 H 4 ] [Me(CD 3)2 N-2-ETC 6 ħ 3 ]