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Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me<sub>2</sub>Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes

Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me2Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes

Type of Publication: Journal article
URI (citable link): http://nbn-resolving.de/urn:nbn:de:bsz:352-238576
Author: Hüttenhofer, Mario; Weeber, Armin; Brintzinger, Hans-Herbert
Year of publication: 2002
Published in: Journal of Organometallic Chemistry ; 663 (2002), 1-2. - pp. 58-62. - ISSN 0022-328X
DOI (citable link): https://dx.doi.org/10.1016/S0022-328X(02)01653-4
Summary:
The stereochemistry of Sn-to-Zr transmetalation was studied by reacting ZrCl4 with that isomer of meso-BnMeSi(3-tBuC5H3)2SnMe2 which has the benzyl group in axial position. Exchange of SnMe2 against ZrCl2 generates both isomers of the CS-symmetric ansa-zirconocene meso-BnMeSi(3-tBuC5H3)2ZrCl2, but not the C1-symmetric, rac-like isomer. The major product is formed under inversion at both Sn-bound C atoms by consecutive "back-side" attacks of the Zr electrophile, while the minor product appears to be formed, under retention at both Sn-bound C atoms, by a concerted "front-side" attack of ZrCl4.
Subject (DDC): 540 Chemistry
Keywords: ansa-zirconocene, tin organyls, transmetalation
Link to License: In Copyright

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HÜTTENHOFER, Mario, Armin WEEBER, Hans-Herbert BRINTZINGER, 2002. Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me2Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes. In: Journal of Organometallic Chemistry. 663(1-2), pp. 58-62. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(02)01653-4

@article{Huttenhofer2002Mecha-23857, title={Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me2Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes}, year={2002}, doi={10.1016/S0022-328X(02)01653-4}, number={1-2}, volume={663}, issn={0022-328X}, journal={Journal of Organometallic Chemistry}, pages={58--62}, author={Hüttenhofer, Mario and Weeber, Armin and Brintzinger, Hans-Herbert} }

eng 2002 2013-07-24T19:18:38Z Weeber, Armin The stereochemistry of Sn-to-Zr transmetalation was studied by reacting ZrCl<sub>4</sub> with that isomer of meso-BnMeSi(3-<sup>t</sup>BuC<sub>5</sub>H<sub>3</sub>)<sub>2</sub>SnMe<sub>2</sub> which has the benzyl group in axial position. Exchange of SnMe<sub>2</sub> against ZrCl<sub>2</sub> generates both isomers of the CS-symmetric ansa-zirconocene meso-BnMeSi(3-<sup>t</sup>BuC<sub>5</sub>H<sub>3</sub>)<sub>2</sub>ZrCl<sub>2</sub>, but not the C<sub>1</sub>-symmetric, rac-like isomer. The major product is formed under inversion at both Sn-bound C atoms by consecutive "back-side" attacks of the Zr electrophile, while the minor product appears to be formed, under retention at both Sn-bound C atoms, by a concerted "front-side" attack of ZrCl<sub>4</sub>. Journal of Organometallic Chemistry ; 663 (2002), 1-2. - S. 58-62 Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me<sub>2</sub>Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes Brintzinger, Hans-Herbert 2013-07-24T19:18:38Z Brintzinger, Hans-Herbert Weeber, Armin Hüttenhofer, Mario terms-of-use Hüttenhofer, Mario

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