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Two New Iron(II) Spin-Crossover Complexes with N₄O₂ Coordination Sphere and Spin Transition around Room Temperature

Title data

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. Vol. 2009 (2009) Issue 36 . - pp. 5527-5534.
ISSN 1099-0682
DOI: https://doi.org/10.1002/ejic.200900846

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry IV > Chair Anorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry IV
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 27 Jul 2017 12:56
Last Modified: 27 Jul 2017 12:56
URI: https://eref.uni-bayreuth.de/id/eprint/38848