Structural, magnetic and IR spectroscopic characterization of dimeric copper(II) trichloroacetate adduct with benzonitrile. Nature of the copper(II)-bezonitrile bond.
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概要
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The benzonitrile adduct of copper(II) trichloroacetate, [Cu(Cl<SUB>3</SUB>CCOO)<SUB>2</SUB>(PhCN)]<SUB>2</SUB>, was prepared and characterized. The dimeric structure was confirmed by an X-ray structural determination. This compound crystallizes in the triclinic space group P\bar1 with <I>a</I>=12.780(1), <I>b</I>=16.064(1), <I>c</I>=10.130(1) Å; α=108.39(1), β=113.34(1), γ=81.07(1)°. The crystal consists of two crystallographically independent dimeric units. Both units have the familiar dimeric copper(II) acetate monohydrate structure with Cu–Cu distances of 2.731(1) and 2.732(1) Å. Magnetic susceptibility data in the range of 80–300 K are well represented by the usual dimer equation with a singlet-triplet energy separation of −2<I>J</I>=224 cm<SUP>−1</SUP>. The C≡N stretching frequency of benzonitrile in the compound shows an increase by 31 cm<SUP>−1</SUP> from the free ligand value. On the basis of the X-ray crystallographic and IR spectroscopic results, the nature of the copper(II)–benzonitrile bond is discussed. For discussion magnetic and spectroscopic properties of some analogous nitrile adducts of copper(II) chloroacetates were also studied.
- 公益社団法人 日本化学会の論文
著者
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Nakashima Michio
Department Of Chemistry Faculty 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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Mikuriya Masahiro
Department Of Chemistry And Open Research Center For Coordination Molecule-based Devices School Of S
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