Structural study of optical resolution. VI. The crystal structure of (+)589-cis-chloroamminebis(ethylenediamine)cobalt(III) d-3-bromocamphor-9-sulfonate monohydrate.

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概要

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• The crystal structure of <I>cis</I>-chloroamminebis(ethylenediamine)cobalt(III) <I>d</I>-3-bromocamphor-9-sulfonate monohydrate, (+)<SUB>589</SUB>-[CoClNH<SUB>3</SUB>(en)<SUB>2</SUB>](<I>d</I>-BCS)<SUB>2</SUB>·H<SUB>2</SUB>O, has been determined by three-dimensional X-ray analysis. The deep red crystals are orthorhombic, space group P2<SUB>1</SUB>2<SUB>1</SUB>2<SUB>1</SUB>, with four formula units in the unit cell of dimensions <I>a</I>=34.97(2), <I>b</I>=14.25(1), and <I>c</I>=7.08(1) Å. The calculated density of 1.64 g·cm<SUP>−3</SUP> compares well with the observed density 1.65 g·cm<SUP>−3</SUP>. The structure has been refined by the block -diagonal least-squares method to an <I>R</I>-factor of 0.096 for 2662 reflection data points. In the complex cation, one of the two ethylenediamine chelate rings has a "50% <I>ob</I>, 50% <I>lel</I>" type disordered character in its conformation and the other ring is in a "<I>lel</I>" type. The absolute configuration of the complex cation is denoted as <I>Λ</I>[(50%λ, 50%δ)δ], which was determined by comparison with that of the <I>d</I>-BCS anion. There are notable differences between the two crystallographically independent <I>d</I>-BCS anions with respect to their local packing modes.

• 公益社団法人 日本化学会の論文

著者

• YONEDA Hayami

  Department of Chemistry, Faculty of Science, Hiroshima University

• Kushi Yoshihiko

  Department Of Chemistry Graduate School Of Science Osaka University

• Kuramoto Masahiro

  Department of Chemistry, Faculty of Science, Hiroshima University

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