1-D coordination polymers consisting of a high-spin Mn17 octahedral unit |
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Authors: | Eleni E Moushi Theocharis C Stamatatos Vassilios Nastopoulos George Christou Anastasios J Tasiopoulos |
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Institution: | 1. Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus;2. Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, United States;3. Department of Chemistry, University of Patras, 26500 Patras, Greece |
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Abstract: | The reaction of Mn(O2CMe)2] · 4H2O with pdH2 (1,3-propanediol) or mpdH2 (2-methyl-1,3-propanediol) in the presence of NaN3 in MeCN/py (py = pyridine) results in the formation of two new one-dimensional coordination polymers composed of a MnIII6MnII11(μ4-O)8(μ3-N3)4]25+ octahedral unit. The peripheral ligation is completed by pd2? (or mpd2?), acetate, pyridine and μ-1,3-N3? ligands. The latter bridges each Mn17 unit to its neighboring one, resulting in the formation of the two 1-D coordination polymers. Variable-temperature dc magnetic susceptibility studies indicate the existence of predominantly ferromagnetic interactions and a resulting giant ground state spin within the Mn17 units and intermolecular antiferromagnetic exchange interactions between the neighboring Mn17 units that result in diamagnetic ground spin states for both polymeric compounds. |
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