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Highly selective propylene dimerization catalyzed by C 1 ‐symmetric zirconocene complexes
Author(s) -
Huang Wenzhong,
Wang Yan,
Ma Haiyan,
Huang Jiling
Publication year - 2014
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3142
Subject(s) - chemistry , methylaluminoxane , substituent , toluene , steric effects , catalysis , ring (chemistry) , ethylene , medicinal chemistry , stereochemistry , polymer chemistry , metallocene , organic chemistry , polymerization , polymer
A series of ethylene‐bridged C 1 ‐symmetric ansa ‐(3‐ R ‐indenyl)(fluorenyl) zirconocene complexes ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ) incorporating a pendant arene substituent on the 3‐position of indenyl ring have been synthesized. The structure of complex 4 was further confirmed by X‐ray diffraction analysis. When activated with methylaluminoxane, four sterically less encumbered complexes 1 , 2 , 4 and 5 could catalyze the dimerization of propylene in toluene at 100°C to afford 2‐methyl‐1‐pentene with high selectivities up to 95.7–98.4% and moderate activities of 2.00 × 10 4 to 7.89 × 10 4 g (mol‐Zr⋅h) −1 . Copyright © 2014 John Wiley & Sons, Ltd.