Chiral-at-<i>ansa</i>-Bridged Group 4 Metallocene Complexes {(R<sup>1</sup>R<sup>2</sup>C)-(3,6-<i>t</i>Bu<sub>2</sub>Flu)(3-R<sup>3</sup>-5-Me-C<sub>5</sub>H<sub>2</sub>)}MCl<sub>2</sub>: Synthesis, Structure, Stereochemistry, and Use in Highly Isoselective Propylene Polymerization
作者:Evgeny Kirillov、Nicolas Marquet、Manuela Bader、Abbas Razavi、Vincenzo Belia、Frank Hampel、Thierry Roisnel、John A. Gladysz、Jean-François Carpentier
DOI:10.1021/om100897j
日期:2011.1.24
analysis, NMR spectroscopy, and X-ray crystallography. When activated with MAO, metallocene complex anti-3a showed very high activity in the polymerization of propylene (14 000 kg(PP)·mol(Zr)−1·h−1, toluene, 60 °C) to yield highly isotactic polypropylene (iPP) with [m]4 = 95.8% and Tm = 153 °C. Both diastereomers of hafnium analogues exhibited lower activities (260−270 kg(PP) mol(Hf)−1·h−1) but distinct
具有单芳基取代的亚甲基桥(R 1 R 2 C)-(((3,6- t Bu 2 Flu)H)(3-R 3 -5-Me-C 5 H 3)(R 1 = H,R 2 = Ph,R 3 = t Bu:2a ; R 1 = H,R 2 = 2,4,6-Me 3 C 6 H 2(Mes); R 3 = CMe 2 Ph(枯基):2b ; R 1 = H,R 2 = 3,5-(CF3)2 C 6 H 3,R 3 = t Bu:2c)或二取代的(R 1 = CF 3,R 2 = Ph,R 3 = t Bu:2d)以及未取代的(非立体异构)亚甲基桥(通过亲核加成到取代的富烯中来合成R 1= R 2= H,R 3=t Bu:2e)。配体2a,2b和2e衍生的锆和ha二氯配合物即Ph(H)C-(3,6- t Bu 2 Flu)(3- t Bu-5-Me-C 5 H 2)} ZrCl 2(3a),Ph(H)C-(