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Structures and Properties of Nonchelated, d 0 Alkyl Alkene Complexes of the Type [Cp 2 ZrMe(alkene)] + : Elusive Intermediates during Ziegler–Natta Polymerizations of Alkenes
Author(s) -
Sauriol Francoise,
Wong Elizabeth,
Leung Angela M. H.,
Donaghue Irja Elliott,
Baird Michael C.,
Wondimagegn Tebikie,
Ziegler Tom
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200900379
Subject(s) - alkene , natta , alkyl , chemistry , polymerization , carbocation , stereochemistry , polymer chemistry , crystallography , photochemistry , catalysis , organic chemistry , polymer
Caught in the act : An alkyl alkene Zr IV complex (see picture; Cp=C 5 H 5 ) has been synthesized and characterized for the first time. The alkene bonding mode is highly asymmetric, and C2 is quite carbocationic. There is also evidence for rotation about the C1C2 bond. This extremely unusual complex provides an exemplar of previously unknown intermediates in Ziegler–Natta and carbocationic polymerization reactions of alkenes.