title: Structures and properties of nonchelated, d0 alkyl alkene complexes of the type [Cp2ZrMe(alkene)]+: elusive intermediates during Ziegler-Natta polymerizations of alkenes.
abstract: 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 C1-C2 bond. This extremely unusual complex provides an exemplar of previously unknown intermediates in Ziegler-Natta and carbocationic polymerization reactions of alkenes.
authors.affiliation: Department of Chemistry, Queen's University, Kingston, ON K7L 3N6, Canada.
authors.forename: Francoise
authors.initials: F
authors.lastname: Sauriol
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Wong
authors.forename: Angela M H
authors.initials: AM
authors.lastname: Leung
authors.forename: Irja Elliott
authors.initials: IE
authors.lastname: Donaghue
authors.forename: Michael C
authors.initials: MC
authors.lastname: Baird
authors.forename: Tebikie
authors.initials: T
authors.lastname: Wondimagegn
authors.forename: Tom
authors.initials: T
authors.lastname: Ziegler