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ansa-metallocene derivatives : XVI. Chiral titanocene and zirconocene derivatives with symmetrically substituted, tetramethylethanediyl-bridged ligand frameworks. Crystal structures of representative examples

ansa-metallocene derivatives : XVI. Chiral titanocene and zirconocene derivatives with symmetrically substituted, tetramethylethanediyl-bridged ligand frameworks. Crystal structures of representative examples

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GUTMANN, Stephan, Peter BURGER, Hans-Ulrich HUND, Josef HOFMANN, Hans-Herbert BRINTZINGER, 1989. ansa-metallocene derivatives : XVI. Chiral titanocene and zirconocene derivatives with symmetrically substituted, tetramethylethanediyl-bridged ligand frameworks. Crystal structures of representative examples. In: Journal of Organometallic Chemistry. 369(3), pp. 343-357. ISSN 0022-328X. Available under: doi: 10.1016/0022-328X(89)85185-X

@article{Gutmann1989ansam-23954, title={ansa-metallocene derivatives : XVI. Chiral titanocene and zirconocene derivatives with symmetrically substituted, tetramethylethanediyl-bridged ligand frameworks. Crystal structures of representative examples}, year={1989}, doi={10.1016/0022-328X(89)85185-X}, number={3}, volume={369}, issn={0022-328X}, journal={Journal of Organometallic Chemistry}, pages={343--357}, author={Gutmann, Stephan and Burger, Peter and Hund, Hans-Ulrich and Hofmann, Josef and Brintzinger, Hans-Herbert} }

Hund, Hans-Ulrich ansa-metallocene derivatives : XVI. Chiral titanocene and zirconocene derivatives with symmetrically substituted, tetramethylethanediyl-bridged ligand frameworks. Crystal structures of representative examples Hofmann, Josef Hund, Hans-Ulrich Brintzinger, Hans-Herbert Gutmann, Stephan Syntheses of disubstituted, tetramethylethanediyl-bridged titanocene derivatives (CH<sub>3</sub>)<sub>4</sub>C<sub>2</sub>(1-C<sub>5</sub>H<sub>3</sub>-3-R)<sub>2</sub>TiCl<sub>2</sub>, with R  t-butyl, trimethylsilyl, isopropyl, α,α-dimethylbenzyl and 1-phenylcyclohexyl, by reductive coupling of the appropriately substituted 6,6-dimethylpentafulvenes with Mg/CCl<sub>4</sub> and reaction of the resulting di-Grignard compounds with TiCl<sub>3</sub>·3THF are described along with those of several zirconium analogues. The reaction sequence in each case gives, together with the desired racemate, comparable amounts of the corresponding meso-configurated complex. The NMR data for the racemic and meso diastereomers of these compounds and crystal structures of one meso and several racemic representatives are reported. 2013-07-30T06:49:14Z Burger, Peter 2013-07-30T06:49:14Z Hofmann, Josef deposit-license 1989 Burger, Peter Brintzinger, Hans-Herbert Journal of Organometallic Chemistry ; 369 (1989), 3. - S. 343-357 Gutmann, Stephan eng

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