rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe+: An Alkyl Zirconocenium Cation Stabilized by Steric Shielding against Interaction with Ancillary Ligands | Sciact - CRIS-system of Boreskov Institute of Catalysis

rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe+: An Alkyl Zirconocenium Cation Stabilized by Steric Shielding against Interaction with Ancillary Ligands Full article

Journal

Organometallics
ISSN: 0276-7333 , E-ISSN: 1520-6041

Output data

Year: 2005, Volume: 24, Number: 5, Pages: 867-871 Pages count : 5 DOI: 10.1021/om049139z

Tags

OLEFIN POLYMERIZATION CATALYSTS; METALLOCENE; METHYLALUMINOXANE; ACTIVATION

Authors

Schröder Lars ¹ , Brintzinger Hans-Herbert ¹ , Babushkin Dmitrii E. ^2,3 , Fischer David ⁴ , Mülhaupt Rolf ⁴

Affiliations

1	Fachbereich Chemie, Universität Konstanz, D-78457 Konstanz, Germany
2	Boreskov Institute of Catalysis, Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
3	Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russian Federation
4	Freiburger Materialforschungszentrum, Universität Freiburg, D-79104 Freiburg, Germany

Funding (1)

International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union

00-841

The sterically shielded cation rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe+, generated by reaction of rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe2 with methylalumoxane (MAO) or with dimethylanilinium or trityl perfluorotetraphenylborate, differs from other, more open zirconocene methyl cations in that it does not form the symmetric AlMe3 adduct rac-Me2Si(2-Me-4-t-Bu-C5H2)2Zr(μ-Me)2AlMe2+. Instead, the unsymmetric ternary adduct rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe(μ-Me)AlMe3−NMe2Ph+ is formed in the presence of dimethylaniline and trimethylaluminum. UV/vis and 1H NMR characteristics of hydrocarbon solutions containing rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe+···B(C6F5)4- or rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe+···MAOMe- indicate that cation−anion association in these ion pairs is unusually weak.

Schröder L. , Brintzinger H-H. , Babushkin D.E. , Fischer D. , Mülhaupt R.
rac-Me2Si(2-Me-4-t-Bu-C5H2)2ZrMe+: An Alkyl Zirconocenium Cation Stabilized by Steric Shielding against Interaction with Ancillary Ligands
Organometallics. 2005. V.24. N5. P.867-871. DOI: 10.1021/om049139z WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Nov 9, 2004
Published online:	Jan 26, 2005
Published print:	Feb 28, 2005

Web of science:	WOS:000227098200019
Scopus:	2-s2.0-14844293865
Elibrary:	13500139
Chemical Abstracts:	2005:67002
Chemical Abstracts (print):	142:316911
OpenAlex:	W2008446721

DB	Citing
Web of science	29
Scopus	30
Elibrary	28
OpenAlex	32