Chiral iron(II) and cobalt(II) complexes with biphenyl-bridged bis(pyridylimine) ligands : syntheses, structures and reactivities

Vedder, Christoph; Schaper, Frank; Brintzinger, Hans-Herbert; Kettunen, Mika; Babik, Sebastian; Fink, Gerhard

Chiral iron(II) and cobalt(II) complexes with biphenyl-bridged bis(pyridylimine) ligands : syntheses, structures and reactivities

Dateien

Vedder_236980.pdfGröße: 6.69 MBDownloads: 778

Datum

2005

Autor:innen

Vedder, Christoph

Schaper, Frank

Brintzinger, Hans-Herbert

Kettunen, Mika

Babik, Sebastian

Fink, Gerhard

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

European Journal of Inorganic Chemistry. 2005, 2005(6), pp. 1071-1080. ISSN 1434-1948. eISSN 1099-0682. Available under: doi: 10.1002/ejic.200400912

Zusammenfassung

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.

Fachgebiet (DDC)

540 Chemie

Schlagwörter

Iron(II), cobalt(II), bianiline, pyridylimine

Zitieren

ISO 690

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, 2005(6), pp. 1071-1080. ISSN 1434-1948. eISSN 1099-0682. Available under: doi: 10.1002/ejic.200400912

BibTex

@article{Vedder2005Chira-23698,
  year={2005},
  doi={10.1002/ejic.200400912},
  title={Chiral iron(II) and cobalt(II) complexes with biphenyl-bridged bis(pyridylimine) ligands : syntheses, structures and reactivities},
  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}
}

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