Studies on mixed chelates. XV. An ESR investigation of solvaochromic copper(II) complexes with various N-alkylated ethylenediamines and .BETA.-diketonates.
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概要
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ESR spectra were obtained for frozen solutions of copper(II) mixed chelate complexes, [Cu(diam)(dike)]ClO<SUB>4</SUB>, having various <I>N</I>-alkylated ethylenediamines (diam) and β-diketonate ligands (dike). The ESR <I>g</I>-factor (<I>g</I><SUB>⁄⁄</SUB>) determined from apparently axial signals may be correlated by a decreasing function to p<I>K</I><SUB>a</SUB> of dikeH or diam ligand for the series of [Cu(tmen)(dike)]<SUP>+</SUP> or [Cu(diam)(acac)]<SUP>+</SUP>, respectively. On the other hand, the <I>g</I><SUB>⁄⁄</SUB> values gradually increased when the former series of complexes were dissolved in more strongly coordinating solvents, and a relationship was found between <I>g</I><SUB>⁄⁄</SUB> and Donor Number of the solvent. These trends are regarded as ligand substituent effect and solvent effect on the <I>g</I><SUB>⁄⁄</SUB> factor, and are analyzed using a crystal field model of a C<SUB>2v</SUB> symmetry.
- 公益社団法人 日本化学会の論文
著者
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KODAMA Naoko
Department of Molecular Pharmacology and Pharmacotherapeutics, Graduate School of Pharmaceutical Sci
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Sone Kozo
Department Of Chemistry Faculty Of Science Josai University
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Fukuda Yutaka
Department Of Chemistry Faculty Of Science Ochanomizu Univeity
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Hoshino Naomi
Department of Chemistry, Faculty of Science, Ochanomizu University
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