Publikation: Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me2Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes
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2002
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Journal of Organometallic Chemistry. 2002, 663(1-2), pp. 58-62. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(02)01653-4
Zusammenfassung
The stereochemistry of Sn-to-Zr transmetalation was studied by reacting ZrCl4 with that isomer of meso-BnMeSi(3-tBuC5H3)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-tBuC5H3)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.
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540 Chemie
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ansa-zirconocene, tin organyls, transmetalation
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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. 2002, 663(1-2), pp. 58-62. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(02)01653-4BibTex
@article{Huttenhofer2002Mecha-23857, year={2002}, doi={10.1016/S0022-328X(02)01653-4}, title={Mechanisms of Sn-to-Zr cyclopentadienyl transfer in the formation of Me<sub>2</sub>Si-bridged zirconocenes from sila-stanna-tetrahydro-s-indacenes}, 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} }
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