Two manganese(II) coordination polymers driven by (iso)nicotinoyl-hydrazone blocks and pseudohalide ancillary ligands: syntheses,structural features,and magnetic properties |
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| Authors: | Ghodrat Mahmoudi Habibar Chowdhury Samuel E Lofland |
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| Institution: | 1. Faculty of Science, Department of Chemistry, University of Maragheh, Maragheh, Iranmahmoudi_ghodrat@yahoo.co.uk;3. Department of Chemistry, Kabi Nazrul College, Murarai, India;4. Department of Physics, Rowan University, Glassboro, NJ, USA |
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| Abstract: | Two coordination polymers, Mn2(μ-L1)2(μ-N3)2]n (1) and Mn(μ-HL2)(SCN)2]n (2), were assembled in a single-pot from MnCl2·4H2O, HL1 (2-acetylpyridine isonicotinoylhydrazone) or HL2 (2-acetylpyridine nicotinoylhydrazone) and ancillary ligand sources (NaN3 or NH4NCS). The products were fully characterized, including by single-crystal X-ray diffraction, which revealed a 2-D metal–organic layer in 1 and a 1-D zigzag coordination chain in 2. Both 1 and 2 are constructed from six-coordinate Mn(II) nodes that adopt distorted octahedral (MnN5O) environments; the adjacent nodes are driven by the μ-L1 and μ-N3 linkers in 1 or μ-HL2 linkers in 2 to form different metal–organic networks. Their topological classification was performed, disclosing the hcb and 2C1 topology in 1 and 2, respectively. Different weak non-covalent interactions promote dimensionality extension. Variable-temperature magnetic susceptibility measurements were carried out, revealing weak ferromagnetic and antiferromagnetic interactions in 1 and 2, respectively. |
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| Keywords: | Manganese coordination polymers crystal engineering topology magnetic properties |
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