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Activation of [Cp 2 ZrMe 2 ] with New Perfluoroaryl Diboranes: Solution Chemistry and Ethylene Polymerization Behavior in the Presence of MeAl(BHT) 2
Author(s) -
Williams V. Clifford,
Dai Chaoyang,
Li Zengmin,
Collins Scott,
Piers Warren E.,
Clegg William,
Elsegood Mark R. J.,
Marder Todd B.
Publication year - 1999
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/(sici)1521-3773(19991216)38:24<3695::aid-anie3695>3.0.co;2-e
Subject(s) - diborane , chemistry , polymerization , ethylene , boron , boranes , medicinal chemistry , polymer chemistry , organic chemistry , polymer , catalysis
Reversible C 6 F 5 transfer takes place between the boron centers in the anion formed by methide abstraction from [MeZr{N(SiMe 3 ) 2 } 3 ] or [Cp 2 ZrMe 2 ] (L n M−CH 3 in the reaction scheme) by the perfluorinated diborane 1 . The solution chemistry of the metallocenium ion pairs formed from 1 and [Cp 2 ZrMe 2 ] is correlated with the observed ethylene polymerization behavior of 1 in comparison to the monoborane B(C 6 F 5 ) 3 , the related diborane 1,2‐C 6 H 4 [B(C 6 F 5 ) 2 ] 2 , and the 9,10‐diboraanthracene compound 9,10‐(C 6 F 5 ) 2 C 12 B 2 F 8 .