Cationic ansa-zirconocene and hafnocene derivatives of a monoanionic phosphonium-bridged bis(permethylcyclopentadienyl) ligand: Synthesis and structural characterization of {[Me2P(C5Me4)(2)]MC1(2)}(+) (M = Zr, Hf) and {[Me2P(C5Me4)(2)]ZrMe2}(+)

摘要

The phosphonium-bridged ansa-metallocene complexes {[Me2P(C5Me4)(2)]ZrCl2}(+) and {[Me2P(C5Me4)(2)]HfCl2}(+) have been prepared by the reactions of {[Me2P(C5Me4)(2)]Li-2}I with ZrCl4 and HfCl4, respectively; the isolation and structural characterization of {[Me2P(C5Me4)(2)]ZrCl2}(+) complete a series ofisostructural zirconocene derivatives, namely, [R2P(Cp-R)(2)-ZrCl2](+), [R2E(Cp-R)(2)ZrCl2] (E = C, Si, Ge), and [R2B(Cp-R)(2)ZrCl2](-), which differ according to the charge on the complex. [References: 25]