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ansa-Metallocene derivatives : Molecular structure and proton magnetic resonance spectra or methylene- and ethylene-bridged dicyclopentadienyltitanium compounds

ansa-Metallocene derivatives : Molecular structure and proton magnetic resonance spectra or methylene- and ethylene-bridged dicyclopentadienyltitanium compounds

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Prüfsumme: MD5:894a388977526f7ecf17a88836516b0c

SMITH, James A., Joachim VON SEYERL, Gottfried HUTTNER, Hans-Herbert BRINTZINGER, 1979. ansa-Metallocene derivatives : Molecular structure and proton magnetic resonance spectra or methylene- and ethylene-bridged dicyclopentadienyltitanium compounds. In: Journal of Organometallic Chemistry. 173(2), pp. 175-185. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(00)81287-5

@article{Smith1979ansaM-23915, title={ansa-Metallocene derivatives : Molecular structure and proton magnetic resonance spectra or methylene- and ethylene-bridged dicyclopentadienyltitanium compounds}, year={1979}, doi={10.1016/S0022-328X(00)81287-5}, number={2}, volume={173}, issn={0022-328X}, journal={Journal of Organometallic Chemistry}, pages={175--185}, author={Smith, James A. and von Seyerl, Joachim and Huttner, Gottfried and Brintzinger, Hans-Herbert} }

ansa-Metallocene derivatives : Molecular structure and proton magnetic resonance spectra or methylene- and ethylene-bridged dicyclopentadienyltitanium compounds Brintzinger, Hans-Herbert 1979 eng Huttner, Gottfried Smith, James A. 2013-07-30T09:18:05Z The molecular structure of the methylene-bridged titanocene dichloride, CH<sub>2</sub>(C<sub>5</sub>H<sub>4</sub>)<sub>2</sub>TiCl<sub>2</sub>, and that of the novel, ethylene-bridged derivative, (CH<sub>2</sub>)<sub>2</sub>-(C<sub>5</sub>H<sub>4</sub>)<sub>2</sub>TiCl<sub>2</sub> have been determined by X-ray diffraction methods. In these molecules the cyclopentadienyl ligands are highly restricted in their torsional mobility. An angle of 65° between the two ring planes, a C-C-C angle of 97.5° at the methylene carbon atom, and other geometrical data, indicate a high degree of strain in the methylene-bridged derivative, whereas the ligand geometry of the ethylene-bridged derivative does not deviate significantly from that of unbridged titanocene dichloride. <sup>1</sup>H NMR spectra for ansa-titanocene derivatives of general type (CH<sub>2</sub>)<sub>n</sub>-C<sub>5</sub>H<sub>4</sub>)<sub>2</sub>TiX<sub>2</sub> (n = 1–3, X = Cl, CH<sub>3</sub>, CO) are reported; the varying degrees of splitting between the high-field and the low-field portions of an A<sub>2</sub>B<sub>2</sub> resonance pattern due to the cyclopentadienyl hydrogen atoms are interpreted in terms of bonding goemetries. Smith, James A. von Seyerl, Joachim Brintzinger, Hans-Herbert 2013-07-30T09:18:05Z Journal of Organometallic Chemistry ; 173 (1979), 2. - S. 175-185 Huttner, Gottfried deposit-license von Seyerl, Joachim

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