A theoretical study on the mechanism of Ziegler‐type polymerizations

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Abstract
The polymerization of olefins with Ziegler catalysts is an intercomplex ion polymerization taking place on two metal atoms. A cationic initiation occurs on a cation of a transition element. In the case of a stereospecific polymerization the activated monomer orients toward and inside a negative complex ion (for instance of aluminum) into which it migrates by adding a propagation starter (R−, H−). In this complex anion all further cationically activated monomers propagate anionically until termination occurs by H− abstraction.