Synthesis,structure and magnetic properties of a tetranuclear Mn(II) complex with carbohydrazone based ligand |
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| Affiliation: | 1. Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran;2. Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland;3. Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany;4. Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, 53714-161 Tabriz, Iran;1. Tianjin Bohai Vocational Technical College, Tianjin 300402, China;2. Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China |
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| Abstract: | A new tetranuclear complex of Mn(II), Mn4(L)2(CH3OH)2(μ-N3)4(N3)2] ? 2(CH3OH) (1), was synthesized and characterized by spectroscopic methods, single-crystal X-ray diffraction analysis and TGA analysis where HL is bis-(E)-N′-(phenyl(pyridin-2-yl)methylene)]carbohydrazide. Single crystal X-ray analysis reveals that 1 has a Mn4 core in which Mn(II) ions are connected by azide and enolate oxygen atoms. IR spectroscopy and X-ray analysis indicate that the carbohydrazone is coordinated to the metal cores as a mononegative ligand in the enol form. The magnetic behavior of 1 was investigated between 2 and 295 K and indicated that the magnetic coupling mediated via azide bridge is ferromagnetic whereas the enolate oxygen mediates antiferromagnetic coupling that leads to overall antiferromagnetic behavior. |
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