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Crystal structure of M(II) bis-μ-diacetoamidopropionate, diaqua·4H2O (M=Cu, Zn, Co): An uncommon carbonyl-O-of-peptide-coordinated two-dimensional layered polymer

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Abstract

Crystal and molecular structures by X-ray diffraction analysis of Co, Cu and Zn complexes of 2,2-diacetoamidopropionic acid are reported. The results show that an uncommon bond from metal ion to a carbonyl-O-of-peptide atom is formed. The structures are isomorphic (Monoclinic,P21/c, with two formula units in the cell). The metal ion lies on a center of symmetry and it is six-oxygen coordinated in an octahedral-type configuration by pairs of water molecules, carboxylic (monodentate) groups and two carbonyl-O-of-peptide atoms. Ligand molecules bridge metal ions, so that the structure consists of a two-dimensional (sheet-type) polymer. Sheets are held together by a hydrogen-bond network making efficient use of the solvent water molecules.

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Authors and Affiliations

  1. Escuela de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, C. U., Culiacán, Sin., México

    Eduardo Zárate M

  2. Institute de Química, Universidad Nacional Autónoma de México, Circuito Exterior, C. U., Coyoacán, 04510, México, D. F., México

    J. Gómez-Lara & Rubén A. Toscano

  3. Universidad Autónoma Metropolitana, Unidad Azcapotzalco; Area de Química, Av. San Pablo, 180 02200, México, D. F., México

    G. Negrón

  4. Departamento de Química, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Purísima y Michoacán, 09340, México, D. F., México

    A. Campero

Authors
  1. Eduardo Zárate M
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  2. J. Gómez-Lara
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  3. Rubén A. Toscano
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  4. G. Negrón
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  5. A. Campero
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Zárate M, E., Gómez-Lara, J., Toscano, R.A. et al. Crystal structure of M(II) bis-μ-diacetoamidopropionate, diaqua·4H2O (M=Cu, Zn, Co): An uncommon carbonyl-O-of-peptide-coordinated two-dimensional layered polymer. Journal of Crystallographic and Spectroscopic Research 22, 281–289 (1992). https://doi.org/10.1007/BF01199530

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  • DOI: https://doi.org/10.1007/BF01199530

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