Hafnium Trialkyls Stabilized by Bulky, Electron-Rich Aminopyridinates
作者:Muhammad Hafeez、Winfried P. Kretschmer、Rhett Kempe
DOI:10.1002/zaac.201100475
日期:2012.2
A series of hafniumaminopyridinates were synthesized and spectroscopically analyzed. In addition, selected examples of these hafnium complexes were characterized by X-ray single crystal structure analysis. The aminopyridinato ligands used here carry an additional dialkylamine substituent to enhance the electron donating ability of the ligands. Structural data and low temperature NMR spectroscopic
合成了一系列氨基吡啶铪盐并对其进行了光谱分析。此外,这些铪配合物的选定实例通过 X 射线单晶结构分析进行了表征。此处使用的氨基吡啶基配体带有额外的二烷基胺取代基以增强配体的给电子能力。结构数据和低温 NMR 光谱研究表明配体的捐赠能力增加。乙烯聚合研究揭示了相当低的催化活性,很可能是由于催化剂不稳定。通过核磁共振光谱研究了失活反应的细节。