The crystal structure and absolute configuration of (-)589-bis(2,4-pentanedionato)(1,3-propanediamine)chromium(III) iodide monohydrate.

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概要

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• The crystal structure of (−)<SUB>589</SUB>-[Cr(acac)<SUB>2</SUB>(tn)]I·H<SUB>2</SUB>O has been determined from the X-ray diffraction data collected on a diffractometer. The crystal is orthorhombic, with the space group P2<SUB>1</SUB>2<SUB>1</SUB>2<SUB>1</SUB> and with <I>a</I>=20.834(6), <I>b</I>=12.015(3), <I>c</I>=7.621(2) Å, and Z=4. Block-diagonal least-squares refinement for 1426 independent reflections with <I>F</I><SUB>o</SUB><SUP>2</SUP>>3σ(<I>F</I><SUB>o</SUB><SUP>2</SUP>) converged to R=4.91%. The complex cation has the <I>Λ</I> absolute configuration. The 1,3-propanediamine ligand assumes a chair conformation. One of the 2,4-pentanedionato chelate rings is almost planar, while in the other the 2,4-pentanedionato plane is bent away from the plane defined by Cr and 2 O donor atoms because of the intramolecular repulsion, the interplanar angle being 9.4°. The interrelation between the absolute configuration and the circular dichroism was discussed for the [Cr(acac)<I><SUB>n</SUB></I>(tn)<SUB>3−<I>n</I></SUB>]<SUP>(3−<I>n</I>)+</SUP>-type complexes.

• 公益社団法人 日本化学会の論文

著者

• Matsumoto Keiji

  Department Of Applied Physics Graduate School Of Engineering Yokohama National University

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