Reaction of Alkenylzirconocenes with Dialkylzirconocenes: Unexpected Formation of Bimetallic (μ-Alkynyl)zirconocene Complexes
journal contribution
posted on 1997-05-13, 00:00 authored by Tamotsu Takahashi, Yasushi Nishihara, Wen-Hua Sun, Reinald Fischer, Kiyohiko NakajimaReaction of alkenylzirconocenes
Cp<sub>2</sub>ZrX(MeCCH<sub>2</sub>) (X = Cl, Br) with dialkylzirconocenes
Cp<sub>2</sub>ZrR<sub>2</sub> (R = Me, Et, Bu) yielded the unexpected
bimetallic
zirconocene complexes
Cp<sub>2</sub>Zr(μ-X)(μ-C⋮CCH<sub>3</sub>)ZrCp<sub>2</sub>
(X
= Cl, Br). Its structure (X = Cl) was determined
by
X-ray crystallography. The monitoring of the reaction
of Cp<sub>2</sub>ZrBu<sub>2</sub> with
Cp<sub>2</sub>ZrBr(MeCCH<sub>2</sub>) revealed that
the
first step of this reaction was an exchange reaction of
the Bu and Br groups.
