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Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-239152 |
Author: | Smith, James A.; von Seyerl, Joachim; Huttner, Gottfried; Brintzinger, Hans-Herbert |
Year of publication: | 1979 |
Published in: | Journal of Organometallic Chemistry ; 173 (1979), 2. - pp. 175-185. - ISSN 0022-328X |
DOI (citable link): | https://dx.doi.org/10.1016/S0022-328X(00)81287-5 |
Summary: |
The molecular structure of the methylene-bridged titanocene dichloride, CH2(C5H4)2TiCl2, and that of the novel, ethylene-bridged derivative, (CH2)2-(C5H4)2TiCl2 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. 1H NMR spectra for ansa-titanocene derivatives of general type (CH2)n-C5H4)2TiX2 (n = 1–3, X = Cl, CH3, CO) are reported; the varying degrees of splitting between the high-field and the low-field portions of an A2B2 resonance pattern due to the cyclopentadienyl hydrogen atoms are interpreted in terms of bonding goemetries.
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Subject (DDC): | 540 Chemistry |
Link to License: | In Copyright |
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} }
Smith_239152.pdf | 399 |