Synthesis, magnetic property, and crystal structure of imidazolate-bridged manganese(III)-copper(II) dinuclear complex.
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概要
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The synthesis, crystal structure, and magnetic property of an imidazolate-bridged manganese(III)–copper(II) dinuclear complex [Mn(salen)Cu(A)]BPh<SUB>4</SUB> are described, where [H<SUB>2</SUB>salen]=<I>N</I>,<I>N</I>′-disalicylideneethylenediamine, [H<SUB>2</SUB>A]=4-(6-methyl-8-oxo-2,5-diazanonane-1,5,7-trienyl)imidazole, and BPh<SUB>4</SUB>=tetraphenylborate. The X-ray analysis confirmed an imidazolate-bridged manganese(III)–copper(II) dinuclear structure, in which the coordination geometries of the manganese(III) and copper(II) ions are square pyramid and square planar, respectively. The apical position of the manganese(III) ion is occupied by an imidazolate nitrogen N(3) of the [Cu(A)] moiety with the bond distance of Mn–N(3) 2.165(5) Å. As the temperature is lowered, the effective magnetic moment per molecule decreases gradually from 5.17 B.M. at 300.2 K, reaches the minimum value 4.44 B.M. at 24.9 K, and then increases to 4.73 B.M. at 4.2 K, indicating that antiferro- and ferro-magnetic interactions are co-operative in the complex.
- 公益社団法人 日本化学会の論文
著者
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Ogawa Takanori
Department Of Cardiovascular Medicine Hokuto Hospital
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Okawa Hisashi
Department Of Chemistry Faculty Of Science Kyushu University
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Ohyoshi Akira
Department Of Applied Chemistry Faculty Of Engineering Kumamoto University
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Kida Sigeo
Department of Chemistry Wakayama University
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Matsumoto Naohide
Department of Applied Chemistry, Faculty of Engineering, Kumamoto University
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Ogawa Takanori
Department of Applied Chemistry, Faculty of Engineering, Kumamoto University
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