Pivalate Bridged High Spin Manganese(II) and Iron(II) Polymers |
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| Authors: | Email author" target="_blank">I?L?EremenkoEmail author M?A?Kiskin I?G?Fomina A?A?Sidorov G?G?Aleksandrov V?N?Ikorskii Yu?G?Shvedenkov Yu?V?Rakitin V?M?Novotortsev |
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| Institution: | (1) N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, GSP-1, Leninsky Prosp. 31, 119991 Moscow, Russia;(2) International Tomography Centre, Siberian Branch, Russian Academy of Sciences, Institutskaya Str. 3a, 630090 Novosibirsk, Russia |
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| Abstract: | Antiferromagnetic Mn(II) polymers of general formula {L2Mn(μ-OOCCMe3)2]Mn2(μ-OOCCMe3)4]}n (L = 1,2-phenylenediamine (3) and 4,5-dimethyl-1,2-phenylenediamine (4)) were synthesized from Mn(μ-OOCCMe3)2(HOEt)]
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(1) polymer and arenediamines in MeCN solution. The tetranuclear cluster Fe4(μ3-OH)2(μ-OOCCMe3)4(η2-OOCCMe3)2(EtOH)6 (5) was prepared by reacting FeSO4·7H2O with KOOCCMe3 in EtOH and was used as starting pivalate iron(II) agent in further reactions. The thermolysis of 5 in MeCN was shown to result in a ferromagnetic polymer Fe(μ-OOCCMe3)2]
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(6) containing tetrahedral iron(II) atoms. Cluster 5 was found to react with o-phenylenediamine giving rise to ferrimagnetic polymer Fe(μ-OOCCMe3)2(HOEt)]n (7). The reaction 7 with 2,6-diaminopyridine in MeCN results in binuclear antiferromagnetic complex (2,6-(NH2)2C5H3N)2Fe2(μ-OOCCMe3)4· 4MeCN (8). However the reaction of 4,5-dimethyl-1,2-phenylenediamine with polymer 7 yields a polymer {L2Fe(μ-OOCCMe3)2]Fe2 (μ-OOCCMe3)4]}
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(9), which is an analogue of the manganese polymer 4. All newly synthesized compounds were characterized by the by X-ray diffraction studies and magnetic measurement.
Dedicated to Professor Ilya I. Moiseev in recognition of his outstanding contribution to cluster chemistry |
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| Keywords: | Polynuclear manganese complexes polynuclear iron complexes carboxylate ligands synthesis X-ray diffraction analysis magnetic properties |
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