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Synthesis and Magnetic Properties of New Octahedral Iron(II) Complexes

Title data

Weber, Birgit ; Kaps, Eike ; Obel, Jaroslava ; Bauer, Wolfgang:
Synthesis and Magnetic Properties of New Octahedral Iron(II) Complexes.
In: Zeitschrift für anorganische und allgemeine Chemie. Vol. 634 (2008) Issue 8 . - pp. 1421-1426.
ISSN 1521-3749
DOI: https://doi.org/10.1002/zaac.200800132

Abstract in another language

The reaction of iron(II) acetate with the tetradentate Schiff base like ligands H2L1 ((E,E)-[{diethyl 2,2′-[1,2-phenylenebis-(iminomethylidyne)]bis[3-oxobutanato]}]) and H2L2 ([([3,3′]-[1,2-phenylenebis(iminomethylidyne)]bis(2,4-pentane-dionato)(2-)-N,N′,O2,O2′]) in the presence of 1-meim (1-methylimidazole) or 2-meim (2-methylimidazole) leads to the formation of pentacoordinated or octahedral complexes depending on the used reaction conditions. Two pentacoordinated and four octahedral iron(II) complexes of the composition [FeL1(1-meim)2] (1), [FeL2(1-meim)] (2), [FeL2(1-meim)2] (3), [FeL2(1-meim)2](DMF) (3(DMF)), [FeL1(2-meim)](MeOH)0.5 (4) and [FeL1(2-meim)2] (5) were isolated and structurally characterized. For the 2-meim complexes a hydrogen bond network between the imidazole N-H hydrogen and the carbonyl oxygen of the equatorial ligand is formed, while for the 1-meim derivatives only weak van der Waals interactions are observed. Magnetic measurements were performed on all samples. As expected, the pentacoordinated complexes remain in the high-spin state in the whole temperature range investigated. For the octahedral complexes, 1 and 5 are pure high-spin complexes while for 3 and 3(DMF) spin transition behaviour is observed.

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 13:16
Last Modified: 27 Jul 2017 13:16
URI: https://eref.uni-bayreuth.de/id/eprint/38854