Type of Publication: | Journal article |
Author: | Schröder, Lars; Brintzinger, Hans-Herbert; Babushkin, Dmitrii E.; Fischer, David; Mülhaupt, Rolf |
Year of publication: | 2005 |
Published in: | Organometallics ; 24 (2005), 5. - pp. 867-871. - ISSN 0276-7333. - eISSN 1520-6041 |
DOI (citable link): | https://dx.doi.org/10.1021/om049139z |
Summary: |
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.
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Subject (DDC): | 540 Chemistry |
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SCHRÖDER, Lars, Hans-Herbert BRINTZINGER, Dmitrii E. BABUSHKIN, David FISCHER, Rolf MÜLHAUPT, 2005. rac-Me 2 Si(2-Me-4-t-Bu-C 5 H 2) 2 ZrMe + : an alkyl zirconocenium cation stabilized by steric shielding against interaction with ancillary ligands. In: Organometallics. 24(5), pp. 867-871. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/om049139z
@article{Schroder2005racMe-23720, title={rac-Me 2 Si(2-Me-4-t-Bu-C 5 H 2) 2 ZrMe + : an alkyl zirconocenium cation stabilized by steric shielding against interaction with ancillary ligands}, year={2005}, doi={10.1021/om049139z}, number={5}, volume={24}, issn={0276-7333}, journal={Organometallics}, pages={867--871}, author={Schröder, Lars and Brintzinger, Hans-Herbert and Babushkin, Dmitrii E. and Fischer, David and Mülhaupt, Rolf} }