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Photochemical isomerization of Me 2 Si-bridged zirconocene complexes : application to stereoselective syntheses of ansa-zirconocene binaphtholate stereoisomers

Photochemical isomerization of Me 2 Si-bridged zirconocene complexes : application to stereoselective syntheses of ansa-zirconocene binaphtholate stereoisomers

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SCHMIDT, Katrin, Annette REINMUTH, Ursula RIEF, Josef DIEBOLD, Hans-Herbert BRINTZINGER, 1997. Photochemical isomerization of Me 2 Si-bridged zirconocene complexes : application to stereoselective syntheses of ansa-zirconocene binaphtholate stereoisomers. In: Organometallics. 16(8), pp. 1724-1728. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/om961089d

@article{Schmidt1997Photo-23756, title={Photochemical isomerization of Me 2 Si-bridged zirconocene complexes : application to stereoselective syntheses of ansa-zirconocene binaphtholate stereoisomers}, year={1997}, doi={10.1021/om961089d}, number={8}, volume={16}, issn={0276-7333}, journal={Organometallics}, pages={1724--1728}, author={Schmidt, Katrin and Reinmuth, Annette and Rief, Ursula and Diebold, Josef and Brintzinger, Hans-Herbert} }

Reinmuth, Annette Organometallics ; 16 (1997), 8. - S. 1724-1728 2013-06-24T16:55:32Z Schmidt, Katrin Rief, Ursula Rief, Ursula deposit-license Brintzinger, Hans-Herbert 2013-06-24T16:55:32Z Diebold, Josef Schmidt, Katrin eng Brintzinger, Hans-Herbert Diebold, Josef Reinmuth, Annette Upon irradiation in toluene solution, meso-racemate mixtures of Me<sub>2</sub>Si(2-Me-4-tBu-C<sub>5</sub>H<sub>2</sub>)<sub>2</sub>ZrCl<sub>2</sub> or Me<sub>2</sub>Si(2-Me-4-phenyl-C<sub>5</sub>H<sub>2</sub>)<sub>2</sub>ZrCl<sub>2</sub> react with 1 equiv of the dilithium salt of racemic binaphthol quantitatively to the racemic binaphtholate complex. Analogous reactions with 1 equiv of the R(+) enantiomer of dilithium binaphtholate give a near-quantitative yield of the enantiomerically pure ansa-zirconocene binaphtholate complex. The structures of the racemic binaphtholate complex, Me<sub>2</sub>Si(2-Me-4-tBu-C<sub>5</sub>H<sub>2</sub>)<sub>2</sub>Zr(binaphtholate), and of a monodentate binaphtholate complex with a meso configurated zirconocene moiety, Me<sub>2</sub>Si(3-tBu-C<sub>5</sub>H<sub>3</sub>)<sub>2</sub>Zr(binaphtholate) chloride, were crystallographically determined. 1997 Photochemical isomerization of Me 2 Si-bridged zirconocene complexes : application to stereoselective syntheses of ansa-zirconocene binaphtholate stereoisomers

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