Magnetic properties of dimeric copper(II) trichloroacetate adducts with 3-substituted pyridines.
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概要
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Dimeric copper(II) trichloroacetate adducts with 3-substituted pyridines, [Cu(Cl<SUB>3</SUB>CCOO)<SUB>2</SUB>(3-Xpy)]<SUB>2</SUB> where X=Cl, Br, H, CN, and CH<SUB>3</SUB>, have been prepared. Magnetic susceptibility and ESR data show that both the singlet–triplet separation (−2<I>J</I>) and the zero field splitting (<I>D</I>) decrease in the order: 3-Clpy adduct (193 and 0.397 cm<SUP>−1</SUP>)≈3-Brpy adduct (191 and 0.399 cm<SUP>−1</SUP>)>py adduct (188 and 0.385 cm<SUP>−1</SUP>)>3-CNpy adduct (138 and 0.216 cm<SUP>−1</SUP>)>3-CH<SUB>3</SUB>py adduct (83 and 0.182 cm<SUP>−1</SUP>). Electronic spectra indicate that the adducts with X=Cl, Br, and H have a distorted square-pyramidal copper(II) geometry and that those X=CN and CH<SUB>3</SUB> have a distorted trigonalbipyramidal geometry. Form these results, it is concluded that the strength of antiferromagnetic interaction in [Cu(Cl<SUB>3</SUB>CCOO)<SUB>2</SUB>(3-Xpy)]<SUB>2</SUB> complexes decreases as the distortion of copper(II) geometry increases from squarepyramid toward trigonal-bipyramid.
- 公益社団法人 日本化学会の論文
著者
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TOKII Tadashi
Department of Chemistry, Faculty of Science and Engineering, Saga University
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Tokii Tadashi
Department Of Chemistry And Applied Chemistry Facukty Of Science And Engineering Saga University
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MUTO Yoneichiro
Department of Chemistry, Faculty of Science and Engineering, Saga University
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KATO Michinobu
Aichi Prefectual University
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Suzuki Ikuo
Department Of Applied Physics Faculty Of Engineering Nagoya University
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Muto Yoneichiro
Department Of Chemistry Faculty Of Science And Engineering Saga University
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Nakashima Michio
Research Institute for Diseases of the Chest, Faculty of Medicine, Kyushu University
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Kato Michinobu
Aichi Prefectural University
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