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Weber, Birgit ; Obel, Jaroslava ; Henner-Vásquez, Dunie ; Bauer, Wolfgang:
Two New Iron(II) Spin-Crossover Complexes with N₄O₂ Coordination Sphere and Spin Transition around Room Temperature.
In: European Journal of Inorganic Chemistry.
Bd. 2009
(2009)
Heft 36
.
- S. 5527-5534.
ISSN 1099-0682
DOI: https://doi.org/10.1002/ejic.200900846
Abstract
The reaction of iron(II) acetate with the tetradentate Schiff base like ligand H2L1 {[3,3′]-[4,5-dihydroxy-1,2-phenylenebis(iminomethylidyne)bis(2,4-pentanedion)]} leads to the formation of the complex [FeL1(MeOH)]. Reaction of this complex with pyridine (py) or N,N′-dimethylaminopyridine (dmap) leads to the two N4O2-coordinated complexes [FeL1(py)2]·py (1) and [FeL1(dmap)2]·MeOH·0.5dmap (2). Both complexes are spin-crossover compounds that were characterised by using magnetic measurements, X-ray crystallography and temperature-dependent 1H NMR spectroscopy. Special attention was given to the role of the two hydroxy groups on the phenyl ring in the formation of a hydrogen-bonding network and the influence of this network on the spin-transition properties. Although only a gradual spin crossover was observed for both complexes, the transition temperature was shifted to higher temperatures relative to that of the complexes with no additional hydroxy groups at the Schiff base like ligand. The hydrogen-bonding network was responsible for this effect.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Anorganische Chemie IV > Professur Anorganische Chemie IV - Univ.-Prof. Dr. Birgit Weber Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Anorganische Chemie IV |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 27 Jul 2017 12:56 |
| Letzte Änderung: | 27 Jul 2017 12:56 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/38848 |