Binuclear metal complexes. IL. Synthesis, ESR, and electrochemical properties of strati-bis copper(II)-nickel(II) complexes.
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概要
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Strati-bis copper(II)–nickel(II) complexes, CuNi(R-sata) and CuNi(R-sacta) (R=H, 5-Me, 5-Br), have been prepared, where H<SUB>4</SUB>(R-sata) and H<SUB>4</SUB>(R-sacta) denote 1,2,3,4-tetrakis(R-salicylideneamino)-2,3-dimethylbutane and 1,2-bis(R-salicylideneamino)-1,2-bis(R-salicylideneaminomethyl)cyclohexane, respectively. ESR spectra of the complexes (frozen chloroform solution at liquid nitrogen temperature) showed a tetragonal pattern with a hyperfine coupling constant <I>A</I><SUB>⁄⁄</SUB> smaller than that of the relevant mononuclear copper(II) complex. Based on cyclic voltammetry and differential pulse polarography, it was shown that the Cu(II)→Cu(I) reduction occurs at a higher potential than that of the mononuclear reference complex. The ESR and electrochemical properties have been interpreted in terms of the stacking of the CuN<SUB>2</SUB>O<SUB>2</SUB> and NiN<SUB>2</SUB>O<SUB>2</SUB> planes and hence the electron delocalization over the whole molecule through the ligand π-system.
- 公益社団法人 日本化学会の論文
著者
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Okawa Hisashi
Department Of Chemistry Faculty Of Science Kyushu University
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Nakamura Masaaki
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Kida Sigeo
Department of Chemistry Wakayama University
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Kakimoto Miyuki
Department of Chemistry, Faculty of Science, Kyushu University 33
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Izumitani Tatuo
Department of Chemistry, Faculty of Science, Kyushu University 33
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