Synthesis,structural characterizations,spectroscopic and magnetic properties of MnII and MnIII complexes with an unprecedented bridging coordination mode of 2-salicylichydrazono-1,3-dithiolane ligand |
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| Authors: | Chahra Bouchameni Chahrazed Beghidja Adel Beghidja Pierre Rabu Richard Welter |
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| Affiliation: | 1. Unité de Recherche de Chimie de l’Environnement et Moléculaire Structurale (CHEMS), Université-Mentouri de Constantine, route Aïn elbey 25000 Constantine, Algeria;2. UMR-CNRS 75040, IPCMS, 23 rue du Loess, 67037 Strasbourg, France;3. UMR-CNRS 7177, Laboratoire DECOMET, Université de Strasbourg, 4 rue Blaise-Pascal, 67070 Strasbourg cedex, France |
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| Abstract: | Two new complexes [MnIII(HL)2(acac)] and [MnII(HL)2]n have been obtained by reacting manganese(III) acetylacetonate monohydrate or manganese(II) chloride monohydrate with 2-salicylichydrazono-1,3-dithiolane ligand (H2L). Both compounds have been fully characterized by spectroscopic methods and single crystal X-ray diffraction. In the solid state, the molecular packing are described and discussed in term of weak H-bonds and short contacts. The unprecedented bridging coordination mode of this ligand lead to the first 2-salicylichydrazono-1,3-dithiolane-bridged coordination polymer [MnII(HL)2]n. The EPR spectrum of this compound was obtained with g ≈ 2.07, corresponding to a manganese ion (+II) in octahedral high-spin coordination sphere. The MnII complex exhibit paramagnetic behavior corresponding to quasi-isolated metal centers. |
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