The preparation and characterization of dichloromanganese(IV) schiff base complexes.
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概要
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Some chloromanganese(III) Schiff base complexes react with hydrogen chloride to give deep green complexes with the empirical formula of MnLCl<SUB>2</SUB> or MnL′<SUB>2</SUB>Cl<SUB>2</SUB>, where H<SUB>2</SUB>L denotes quadridentate ligands such as <I>N</I>,<I>N</I>′-disalicylideneethylenediamine and its analogs, and where HL′ denotes bidentate ligands such as <I>N</I>-butylsalicylideneamine and its analogs. These complexes are nonelectrolytes in acetonitrile. Their magnetic moments at room temperature fall within the range of 3.9 to 4.1 BM, and the magnetic susceptibilities obey the Curie-Weiss law with small θ values over the temperature range of 77 to 300 K, indicating that the oxidation state of the manganese ions in these complexes is +IV. The electronic spectra show an intense band around 16000 cm<SUP>−1</SUP> which can be assigned to a charge-transfer transition. In the cyclic voltammograms, two cathodic waves are observed at half-peak potentials around +0.9 V and −0.2 V(<I>vs.</I> SCE); they can be assigned to the reductions of Mn(IV) to Mn(III) and of Mn(III) to Mn(II) respectively. The probable configurations of the complexes are discussed on the basis of the infrared spectra.
- 公益社団法人 日本化学会の論文
著者
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Shono Toshiyuki
Department Of Applied Chemistry Faculty Of Engineering Osaka Institute Of Technology
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Matsushita Takayuki
Department Of Materials Chemistry Faculty Of Science And Technology Ryukoku University
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KONO Hiroshi
Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University
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Kono Hiroshi
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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