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Back Cover: Effects of the Linking of Cyclopentadienyl and Ketimide Ligands in Titanium Half‐Sandwich Olefin Polymerization Catalysts (ChemCatChem 16/2017)
Author(s) -
Varga Vojtech,
Večeřa Miloš,
Gyepes Róbert,
Pinkas Jiří,
Horáček Michal,
Merna Jan,
Lamač Martin
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701278
Subject(s) - methylaluminoxane , polymerization , cyclopentadienyl complex , titanium , catalysis , olefin polymerization , polymer chemistry , polyethylene , moiety , chemistry , olefin fiber , materials science , metallocene , organic chemistry , polymer
The Cover picture symbolically represents the effect of different activators (watering cans) on the olefin polymerization activity of two half‐sandwich titanium ketimide complexes (flowers in pots).In their Full Paper, V. Varga et al. describe that the complex with the cyclopentadienyl‐tethered ketimide moiety is only poorly active when methylaluminoxane is used as the activator. However, if an aluminum‐free activator system based on hydrosilane and B(C 6 F 5 ) 3 is used, both complexes perform comparably well. In the background, a glass polymerization autoclave full of precipitated high‐density polyethylene prepared with one of the mentioned catalytic systems is shown.