Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-236980 |
Author: | Vedder, Christoph; Schaper, Frank; Brintzinger, Hans-Herbert; Kettunen, Mika; Babik, Sebastian; Fink, Gerhard |
Year of publication: | 2005 |
Published in: | European Journal of Inorganic Chemistry ; 2005 (2005), 6. - pp. 1071-1080. - ISSN 1434-1948. - eISSN 1099-0682 |
DOI (citable link): | https://dx.doi.org/10.1002/ejic.200400912 |
Summary: |
A new class of iron(II) and cobalt(II) complexes with neutral, tetradentate bis(pyridylimine) chelate ligands bridged by a chiral 6,6′-dimethylbiphenyl backbone has been synthesized. Their dihalogen derivatives gave spectral, magnetic and X-ray diffraction results in agreement with a C2-symmetric, approximately octahedral geometry with cis-positioned halide ligands and high-spin d-electron configuration. 1H NMR signals of these paramagnetic complexes were assigned by correlating line widths with reciprocal proton-metal distances. Methyl substitution in 6-position of the pyridyl rings lead to a different, presumably square-pyramidal coordination geometry under dissociation of one chloride ion. FeII dimethyl and diisocyanide derivatives were shown to have low-spin configuration and C1-symmetric geometry. With respect to MAO-activated olefin polymerization, significant catalytic activities were reproducibly obtained only under conditions, where the original complex structure was degraded.
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Subject (DDC): | 540 Chemistry |
Keywords: | Iron(II), cobalt(II), bianiline, pyridylimine |
Link to License: | In Copyright |
VEDDER, Christoph, Frank SCHAPER, Hans-Herbert BRINTZINGER, Mika KETTUNEN, Sebastian BABIK, Gerhard FINK, 2005. Chiral iron(II) and cobalt(II) complexes with biphenyl-bridged bis(pyridylimine) ligands : syntheses, structures and reactivities. In: European Journal of Inorganic Chemistry. 2005(6), pp. 1071-1080. ISSN 1434-1948. eISSN 1099-0682. Available under: doi: 10.1002/ejic.200400912
@article{Vedder2005Chira-23698, title={Chiral iron(II) and cobalt(II) complexes with biphenyl-bridged bis(pyridylimine) ligands : syntheses, structures and reactivities}, year={2005}, doi={10.1002/ejic.200400912}, number={6}, volume={2005}, issn={1434-1948}, journal={European Journal of Inorganic Chemistry}, pages={1071--1080}, author={Vedder, Christoph and Schaper, Frank and Brintzinger, Hans-Herbert and Kettunen, Mika and Babik, Sebastian and Fink, Gerhard} }
Vedder_236980.pdf | 702 |