Reactions of Bis(pentafluorophenyl)borane with Phosphine Olefin Complexes of Zirconocene
journal contribution
posted on 1996-10-01, 00:00 authored by Yimin Sun, Warren E. Piers, Steven J. RettigZirconocene olefin complexes
Cp<sub>2</sub>Zr(PPh<sub>2</sub>Me)(η<sup>2</sup>-RCHCH<sub>2</sub>) (R = H, Et, Ph) react rapidly
with 2
equiv of
[HB(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub>]<i><sub>n</sub></i>
to give the zwitterionic products
Cp<sub>2</sub>Zr{η<sup>3</sup>-[CH(R)CH<sub>2</sub>BH(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub>]}
(R = H (<b>2a</b>), Et (<b>2b</b>),
Ph (<b>2c</b>)) and the borane−phosphine adduct
Ph<sub>2</sub>MeP·
HB(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub>.
Spectroscopic and structural evidence confirms an interaction between zirconium and the β-carbon
attached to boron, resulting in pentacoordinated carbon.
History
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- 1. DOI - Is supplement to Reactions of Bis(pentafluorophenyl)borane with Phosphine Olefin Complexes of Zirconocene
