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Characterization of Intermediate Steps in the Polymerizations with Ziegler Catalysts on MgH 2 by CP/MAS NMR Spectroscopy
Author(s) -
Benn Reinhard,
Hermann Wolfram
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199104261
Subject(s) - characterization (materials science) , catalysis , nuclear magnetic resonance spectroscopy , spectroscopy , materials science , polymer chemistry , chemistry , organic chemistry , physics , nanotechnology , quantum mechanics
The binuclear complex [Cp 2 Zr(μ‐Cl)(μ‐CH 2 Me)AlMeEt] 1 attached to a support is formed by the reaction of [Cp 2 ZrMe 2 ] and MgH 2 after the addition of the cocatalyst (Et 2 AlCl) 2 . Species 1 catalyzes the polymerization of ethylene by inserting ethylene molecules into the Zr–μ‐alkyl bond. The intermediate steps in the formation of 1 and the polymerization could be observed by means of 13 C CP/MAS NMR spectroscopy.