The structure of (hydrogen ethylenediaminetetraacetato)antimony(III) dihydrate Sb(C10H13N2O8)2H2O.

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概要

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• The crystal and molecular structure of the title complex has been determined by X-ray diffraction using 1882 reflections. The crystal was orthorhombic, with the space group Pbn2<SUB>1</SUB>; <I>a</I>=10.98(2), <I>b</I>=18.496(4), <I>c</I>=7.341(9), <I>Z</I>=4, <I>D</I><SUB>x</SUB>=1.99, <I>D</I><SUB>m</SUB>=1.98(2) g cm<SUP>−3</SUP>,μ(Mo <I>K</I>α)=19.3 cm<SUP>−1</SUP>, and the final <I>R</I> value was 0.036. A distorted ψ-pentagonal bipyramid is formed around the central antimony(III) atom by two nitrogen and two oxygen atoms, together with a lone electron pair at the equatorial positions and two oxygen atoms at the axial positions. One of the Sb–O distances, 2.78 Å, is longer than the others (2.20(2) Å on the average), and it is determined that the carbonyl oxygen is essentially of the free-acid type and that its carbonyl oxygen is weakly coordinated. The splitting of the ν<SUB>as</SUB>(COO) band of its infrared and Raman spectra shows the existence of both free and coordinated carboxyl groups. The <SUP>1</SUP>H- and <SUP>13</SUP>C-NMR results show that the antimony(III)–edta complex does not exchange with the free ligand in an aqueous solution at pH 1.5–3.5.

• 公益社団法人 日本化学会の論文

著者

• Iwamoto Toschitake

  Department Of Chemistry College Of Arts And Sciences The University Of Tokyo

• Shimoi Mamoru

  Department Of Basic Science Graduate School Of Arts And Sciences The University Of Tokyo

• KITA ITSURO

  Department of Environmental Changes, Faculty of Social and Cultural Studies, Kyushu University

• Uehiro Takashi

  Department of Chemistry, College of General Education, The University of Tokyo

• Ouchi Akira

  Department of Chemistry, College of Arts and Sciences, The University of Tokyo

• Yoshino Yukichi

  Department of Chemistry, Aoyama Gakuin University

• Orita Yoshinari

  Department of Chemistry, College of General Education, The University of Tokyo

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