Preparation and Characterization of Bis(cyclopentadienyl)zirconium(II) Complexes with a Tethered Olefin−Phosphine Ligand
journal contribution
posted on 1999-07-10, 00:00 authored by Akiko Yamazaki, Yasushi Nishihara, Kiyohiko Nakajima, Ryuichiro Hara, Tamotsu TakahashiUnprecedented zirconium(II) complexes bearing tethered olefin−phosphine ligands were
synthesized and characterized. The molecular structures of the newly synthesized complexes
(η<sup>5</sup>-1,2-Me<sub>2</sub>C<sub>5</sub>H<sub>3</sub>)<sub>2</sub>Zr(CH<sub>2</sub>CHCH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>) (<b>1c</b>) and Cp<sub>2</sub>Zr(CH<sub>2</sub>CHCH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>) (<b>2a</b>)
were determined by single-crystal X-ray diffraction methods. The stability and reactivity of
the series of complexes Cp<sub>2</sub>Zr{CH<sub>2</sub>CH(CH<sub>2</sub>)<i><sub>n</sub></i>PR<sub>2</sub>} (<i>n</i> = 2, 3; R = Et, Ph) were examined.
The complex <b>2a</b> showed simultaneously both sufficient stability and high reactivity.
