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Crystal structure of copper(II)mellitate, [Cu3.5C6(COO)5(COOH)(OH)2(H2O)8.5]·4.5H2O

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Abstract

The crystal structure of copper(II)mellitate, Cu3.5C12H29O27, has been determined by X-ray analysis. The complex crystallizes in the orthorhombic space groupIba2, with unit-cell dimensionsa=19.274(3),b=21.054(7),c=12.956(4) Å. The structure was deduced by the direct method with the help of the Patterson method and refined by the block-diagonal least-squares technique to a finalR value of 0.037 for 2995 observed reflections. Among six carboxyl groups of mellitic acid, five groups lose protons and form coordinate bonds to four copper atoms, and the remaining group forms hydrogen bonds to the water of crystallization and coordinated water. The configuration around copper is distorted-pyramidal, with the Cu-O bond distances of 1.896(7) to 2.425(7) Å.

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Authors and Affiliations

  1. Institute of Chemistry, College of General Education, Osaka University, Toyonaka, 560, Osaka, Japan

    Hatsue Tamura, Kazuhide Ogawa & Wasuke Mori

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  1. Hatsue Tamura
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  2. Kazuhide Ogawa
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  3. Wasuke Mori
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Tamura, H., Ogawa, K. & Mori, W. Crystal structure of copper(II)mellitate, [Cu3.5C6(COO)5(COOH)(OH)2(H2O)8.5]·4.5H2O. Journal of Crystallographic and Spectroscopic Research 19, 203–213 (1989). https://doi.org/10.1007/BF01160857

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  • DOI: https://doi.org/10.1007/BF01160857

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