Very large counteranion modulation of cationic metallocene polymerization activity and stereoregulation by a sterically congested (perfluoroaryl)fluoroaluminate

Journal Article · Tue Mar 11 23:00:00 EST 1997 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja963834j· OSTI ID:466370

Chen, Y X; Stern, C L; Marks, T J ^[1]

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1. Northwestern Univ., Evanston, IL (United States)

We communicate here the unusual structural and cocatalytic features of a new, stable (perfluoroaryl)aluminate anion, tris(2,2`,2``-nonafluorobiphenyl)flouroaluminate (PBA{sup -}). Noteworthy features include very large ion pairing/metallocenium ancillary ligand structural effects on olefin polymerization activity and stereoselectivity. These results considerably expand what is known about the consequences of strong cation-anion interactions for group 4-mediated olefin polymerization. For anions that coordinatively `intrude` into the cation coordination sphere, the effects can be dramatic. 15 refs., 1 tab.

• DOE Contract Number: FG02-86ER13511
• OSTI ID: 466370
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 10 Vol. 119; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ALKENES
ALUMINIUM COMPLEXES
ANIONS
CATALYSTS
ETHYLENE
ORGANOMETALLIC COMPOUNDS
POLYMERIZATION
REACTION KINETICS
STEREOCHEMISTRY
STRUCTURAL CHEMICAL ANALYSIS
THERMODYNAMIC ACTIVITY