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Polymer Microstructure Control in Catalytic Polymerization Exclusively by Electronic Effects of Remote Substituents

Polymer Microstructure Control in Catalytic Polymerization Exclusively by Electronic Effects of Remote Substituents

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Prüfsumme: MD5:d77a60fe405293f30232edca0a08794e

BASTERO, Amaia, Inigo GÖTTKER-SCHNETMANN, Caroline RÖHR, Stefan MECKING, 2007. Polymer Microstructure Control in Catalytic Polymerization Exclusively by Electronic Effects of Remote Substituents. In: Advanced Synthesis and Catalysis. 349(14/15), pp. 2307-2316. ISSN 1615-4150. eISSN 1615-4169. Available under: doi: 10.1002/adsc.200700127

@article{Bastero2007Polym-9857, title={Polymer Microstructure Control in Catalytic Polymerization Exclusively by Electronic Effects of Remote Substituents}, year={2007}, doi={10.1002/adsc.200700127}, number={14/15}, volume={349}, issn={1615-4150}, journal={Advanced Synthesis and Catalysis}, pages={2307--2316}, author={Bastero, Amaia and Göttker-Schnetmann, Inigo and Röhr, Caroline and Mecking, Stefan} }

2007 eng Polymer Microstructure Control in Catalytic Polymerization Exclusively by Electronic Effects of Remote Substituents deposit-license First publ. in: Advanced Synthesis and Catalysis 349 (2007), 14/15 , pp. 2307-2316 Röhr, Caroline Göttker-Schnetmann, Inigo Göttker-Schnetmann, Inigo Bastero, Amaia application/pdf 2011-03-24T18:14:54Z Mecking, Stefan Röhr, Caroline Bastero, Amaia Mecking, Stefan 2011-03-24T18:14:54Z A series of (2-N,O)salicylaldiminato nickel methyl pyridine complexes 8a-h-pyr bearing 2,6-di-(4-R-phenyl)phenyl groups on the imine nitrogen and varying in the remote substituents [R=C8F17 (a), CF3 (b), F (7c), H (d), Me (e), tert.-butyl (f), OMe (g), and NMe2 (h)] were studied as precatalysts for ethylene polymerization. Complexes 8a-h-pyr catalyze the polymerization of ethylene to low molecular weight polyethylene. Decreasing molecular weight and increasing degrees of branching are observed in the order R=C8F17CF3>F>H>Me>MeO>tert-butyl>NMe2. X-Ray diffraction analysis of complex 8c-pyr and polymerization results obtained with complexes 8-pyr indicate that it is not the sterics but the electronics of the R group that control the polymer microstructure. This is a rare example of a polymerization catalyst in which substituents effects can clearly be traced to electronics exclusively.

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

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