| Synthesis, Crystal Structure, and Magnetic Properties of the Coordination Polymer [Fe(NCS)(2)(1,2-bis(4-pyridyl)-ethylene)](n) Showing a Two Step Metamagnetic Transition. | |
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MedLine Citation:
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PMID: 23276282 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Reaction of iron(II) thiocyanate with an excess of trans-1,2-bis(4-pyridyl)-ethylene (bpe) in acetonitrile at room temperature leads to the formation of [Fe(NCS)(2)(bpe)(2)·(bpe)] (1), which is isotypic to its Co(II) analogue. Using slightly different reaction conditions the literature known compound [Fe(NCS)(2)(bpe)(2)(H(2)O)(2)] (2) was obtained as a phase pure material. Simultaneous differential thermoanalysis and thermogravimetry prove that the hydrate 2 transforms into the anhydrate [Fe(NCS)(2)(bpe)(2)] (3), that decomposes on further heating into the new ligand-deficient 1:1 compound of composition [Fe(NCS)(2)(bpe)](n) (4), which can also be obtained directly by thermal decomposition of 1. Further investigations reveal that 4 can also be prepared under solvothermal conditions, and single crystal structure analysis shows that the iron(II) cations are linked via μ-1,3 bridging thiocyanato anions into chains, that are further connected into layers by the bpe ligands. Magnetic measurements, performed on powder samples, prove that 1 and 2 show only Curie-Weiss behavior, whereas in 4 antiferromagnetic ordering with a Néel temperature of 5.0 K is observed. At T < 4.0 K a two-step metamagnetic transition occurs at applied magnetic fields of 1300 and 1775 Oe. The magnetic properties are discussed and compared with those of related compounds. |
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Authors:
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Susanne Wöhlert; Mario Wriedt; Tomasz Fic; Zbigniew Tomkowicz; Wolfgang Haase; Christian Näther |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-12-31 |
Journal Detail:
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Title: Inorganic chemistry Volume: - ISSN: 1520-510X ISO Abbreviation: Inorg Chem Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2013-1-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0366543 Medline TA: Inorg Chem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Strasse 2, D-24118 Kiel, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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