Organo-lewis acid cocatalysts in single-site olefin polymerization - A highly acidic perfluorodiboraanthracene

Angewandte Chemie - International Edition

Volumn 39, Issue 7, 2000, Pages 1312-1316

  Metz, Matthew V ^a   Schwartz, David J ^a,b   Stern, Charlotte L ^a   Nickias, Peter N ^b   Marks, Tobin J ^a  

^a NORTHWESTERN UNIVERSITY   (United States)

^b DOW CHEMICAL COMPANY   (United States)

Author keywords

Boranes; Homogeneous catalysis; Lewis acids; Metallocenes; Polymerizations

Indexed keywords

ALKENE; ANTHRACENE DERIVATIVE; BORANE DERIVATIVE;

ACIDITY; ARTICLE; CATALYSIS; CATALYST; CHEMICAL STRUCTURE; POLYMERIZATION; REACTION ANALYSIS; SYNTHESIS;

EID: 0034599398     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(20000403)39:7<1312::AID-ANIE1312>3.0.CO;2-4     Document Type: Article

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40. -1; T = - 120°C. The structure was solved by direct methods. All non-hydrogen atoms were refined anisotropically. Hydrogen atoms were included in idealized positions and not refined. The final cycle of full-matrix least-squares refinement was based on 8069 observed reflections (I>2.00 σ(I)) and 523 variable parameters and converged (largest parameter shift was 0.087 times its esd) with unweighted and weighted agreement factors of R = 0.042 and Rw = 0.118. For clarity of the crystallographic discussion, note that there are two half molecules in the asymmetric unit, and consequently there are two independent bond lengths and angles for each bond length/angle of Vb. Crystallographic data (excluding structure factors) for the structure reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-135514. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB21EZ, UK (fax: (+44)1223-336-033; e-mail: deposit@ccdc.cam. ac.uk).
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42. 2, in which at room temperature and below, the complexes are sufficiently stable for adequate spectroscopy.