A general one-pot synthesis for elusive 2-substituted indenes: does bis[2-(tert-butyl)indenyl]zirconium(<scp>iv</scp>) dichloride/MAO polymerise ethene?
作者:Andreas C. Möller、Richard Blom、Richard H. Heyn、Ole Swang、Jürgen Kopf、Tanja Seraidaris
DOI:10.1039/b516130d
日期:——
indenes, 2-trifluoroindene and 2-tert-butylindene are poorly or incompletely described in the open literature. We herein describe an efficient one-potsynthesis of these compounds as a variation of the Perkin reaction which allows us to refute an earlier claim that bis(2-tert-butylindenyl)zirconium(IV) dichloride (2a) will not polymerise ethene. In fact, 2a/MAO polymerises ethene to extremely high molecular
Process for the preparation of amorphous polymers of propylene
申请人:Basell Technology Company B.V.
公开号:EP0693506B1
公开(公告)日:2001-08-29
<i>C</i><sub>1</sub>-Symmetric Si-bridged (2-indenyl)(1-indenyl) <i>ansa</i>-metallocenes as efficient ethene/1-hexene copolymerization catalysts
作者:Dmitry V. Uborsky、Dmitry Y. Mladentsev、Bogdan A. Guzeev、Ilya S. Borisov、Antonio Vittoria、Christian Ehm、Roberta Cipullo、Coen Hendriksen、Nic Friederichs、Vincenzo Busico、Alexander Z. Voskoboynikov
DOI:10.1039/c9dt04896k
日期:——
Synthesis, ethene/1-hexene copolymerization screening, and QSAR study of 28 silicon bridged (2-indenyl)(1-indenyl) zirconocenes: new promising catalysts for LLDPE were identified.
Synthesis and characterization of new bis(2-R-indenyl) zirconium dichloride complexes for the olefin polymerization
作者:Gong Yeal Lee、Ming Xue、Myoung Soon Kang、Oh Chul Kwon、Jin-San Yoon、Yoo-Su Lee、Hoon Sik Kim、Hyunjoo Lee、Ik-Mo Lee
DOI:10.1016/s0022-328x(98)00386-6
日期:1998.5
corresponding alkyl anions to 2-indanone in the presence (or absence) of LaCl3. With these 2-alkylindenes, bis(2-alkylindenyl)zirconium dichloride complexes were synthesized to investigate the effects of alkyl substituents at 2-position of indene on the rotational conversion rate between rotamers (racemic and meso) and the catalytic activities toward olefin polymerization. Analysis of NMR spectra could line