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Six-coordinated zinc complexes: [Zn(H2O)4(phen)] (NO3)2·H2O and [ZnNO3(H2O)(bipy)(Him)]NO3 (phen = 1,10-phenanthroline, bipy = 2,2′-bipyridine, and Him = imidazole)

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Abstract

Two novel six-coordinated zinc complexes, tetra-aqua(1,10-phenanthroline)zinc dinitrate monohydrate, [Zn(H2O)4(phen)](NO3)2·H2O (1) and aqua(2,2′-bipyridine)(imidazole)-nitratozinc nitrate, [ZnNO3(H2O)(bipy)(Him)]NO3 (2) were prepared. Compound 1 crystallizes in the monoclinic space group P21/c with a = 8.780(4), b = 13.609(4), c = 15.368(5) Å, β = 93.86(2)°C, V = 1832.1(12) Å3. In 1, a phenanthroline molecule chelates the zinc atom and four water molecules complete the octahedral geometry around the metal. Compound 2 crystallizes in the monoclinic space group P21/n with a = 7.250(1), b = 24.554(4), c = 10.258(2) Å, β = 107.880(10)°, V = 1737.9(5) Å3. In 2, a bipyridine molecule and a nitrate anion chelate the zinc atom. An imidazole molecule and a water molecule then complete the six-coordinated geometry around zinc. The intermolecular packing is controlled by hydrogen bonding, especially in 1 and by π stacking. The thermal stability of the compounds and the loss of water molecules and ligands was monitored by a thermogravimetric study.

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Authors and Affiliations

  1. Chemistry Department, Shanghai Jiaotong University, Shanghai, 200240, People's Republic of China

    Cungen Zhang

  2. Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstr. 21, 79104, Freiburg, Germany

    Christoph Janiak

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  1. Cungen Zhang
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  2. Christoph Janiak
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Zhang, C., Janiak, C. Six-coordinated zinc complexes: [Zn(H2O)4(phen)] (NO3)2·H2O and [ZnNO3(H2O)(bipy)(Him)]NO3 (phen = 1,10-phenanthroline, bipy = 2,2′-bipyridine, and Him = imidazole). Journal of Chemical Crystallography 31, 29–35 (2001). https://doi.org/10.1023/A:1013774502147

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