Reversible C(6)F(5) transfer takes place between the boron centers in the anion formed by methide abstraction from [MeZrN(SiMe(3))(2)}(3)] or [Cp(2)ZrMe(2)] (L(n)M-CH(3) in the reaction scheme) by the perfluorinated diborane 1. The solution chemistry of the metallocenium ion pairs formed from 1 and [Cp(2)ZrMe(2)] is correlated with the observed ethylene polymerization behavior of 1 in comparison to the
Synthesis and crystal structure of the tris(amide) cations [M{N(SiMe3)2}3]+ (M = Zr or Hf ): evidence for M–Si–C interactions
作者:Jane R. Galsworthy、Malcolm L. H. Green、Neil Maxted、Matthias Müller
DOI:10.1039/a706720h
日期:——
strong Lewis acid B(C6F5)3 with [MN(SiMe3)2}3Me] (M = Zr or Hf) gave the compounds [MN(SiMe3)2}3][MeB(C6F5)3]. Crystallographic analyses of these compounds revealed the formation of multicentre bonds between the SiCH3 units of the amide ligands and the otherwise electron-deficient metal centre. The new tris(amide) complexes [MN(Ph)SiMe3}3Cl] and [MN(Ph)SiMe3}3Me] (M = Zr or Hf) have also been synthesized