Synthesis and Molecular Structures of Ferrocene and Zirconocene Featuring Bis(di(3,5-di-tert.-butyl)phenylphosphino) Groups

摘要

abstract_textpNew bulky diphosphino-ferrocene 4 and diphosphino-zirconocene 8, modified with a number of tert-butyl groups, were synthesized and characterized by single crystal X-Ray and/or NMR analyses. Complex NiCl2(4) was prepared and its molecular structure was established by a single crystal X-Ray analysis. Buried percent volume ( V-Bur) of novel bulky diphosphino-ferrocene 4 was calculated to be greater than that of dppf. Because of this NiCl2(4) catalyst demonstrated 2.5 times higher activity compared to NiCl2(dppf) in the model ethylene polymerization reaction./p/abstract_text