Structural studies of thiocyanato and isothiocyanato cobalt(III) complexes ligating diamine-N,N'-polycarboxylates.
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概要
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Crystal and molecular structures of NH<SUB>4</SUB>[Co(NCS)(hedtra)]·H<SUB>2</SUB>O and K[Co(SCN)(edtra)]·1.5H<SUB>2</SUB>O have been determined by single-crystal X-ray analyses, where hedtra<SUP>3−</SUP> and edtra<SUP>3−</SUP> denote <I>N</I>-(2-hydroxyethyl)ethylenediamine-<I>N</I>,<I>N</I>′,<I>N</I>′-triacetate and ethylenediamine-<I>N</I>,<I>N</I>,<I>N</I>′-triacetate ions, respectively. Crystal data are as follows: For the former species, triclinic, space group P1, <I>a</I>=7.477(2)Å, <I>b</I>=9.135(2)Å, <I>c</I>=6.899(1)Å; α=84.37(2)°, β=107.31(2)°, γ=108.35(2)°, <I>V</I>=427.0(2)Å<SUP>3</SUP>, <I>Z</I>=1; for the latter species, monoclinic, space group P2<SUB>1</SUB>/a, <I>a</I>=15.288(2)Å, <I>b</I>=7.059(1)Å, <I>c</I>=14.373(2)Å, β=107.55(1), <I>V</I>=1479.0(4)Å<SUP>3</SUP>, <I>Z</I>=4. It has been proved unequivocally that the former species contains N-bonded SCN<SUP>−</SUP> ligand and the latter species, the S-bonded ligand. Coordination geometry around the cobalt atom in each species deviates considerably from the regular octahedron, so that a very open space is created around the Co–NCS or Co–SCN moiety. This structural feature may be associated with the facile formation of the novel S-bonded species.
- 公益社団法人 日本化学会の論文
著者
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Ogino Hiroshi
Department Of Chemistry Faculty Of Science Tohoku University
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Toriumi Koshiro
Department Of Material Science Himeji Institute Of Technology
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Kato Yoshikiyo
Department Of Chemistry Faculty Of General Education Yamagata University
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Ito Tasuku
Department of Applied Molecular Science, Institute for Molecular Science
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Isago Hiroaki
Department of Chemistry, Faculty of Science, Tohoku University
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Toriumi Koshiro
Department of Applied Molecular Science, Institute for Molecular Science
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