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Synthesis, crystal structures, and characterization of a new substituted 1,2,4-triazole and its two Co(II)/Mn(II) complexes

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Abstract

A new triazole-substituted ligand H2L (H2Trza = 3-amino-1H-1,2,4-triazole-5-acetate) and its two new isomorphic compounds [M(HTrza)2(H2O)2] ∙ 2H2O (Co(I) and Mn(II)) have been synthesized and characterized structurally. Their X-ray crystal structures (CIF files CCDC nos. 906893 for I and 906892 for II) show that H2L belongs to a tetragonal system; space group P43 with a = b = 5.0445(13), c = 27.054(10) Å; Z = 4. Complex I belongs to a monoclinic system; space group P21/n with a = 7.6543(8), b = 7.3453(8), c = 13.6283(14) Å; β = 91.5990(10)°, Z = 2. Complex II belongs to a triclinic system; space group with a = 6.8550(15), b = 8.0630(18), c = 15.173(4) Å; α = 84.794(4)°, β = 79.005(3)°, γ = 73.779(4)°, Z = 2. X-ray analysis demonstrates that compound H2L is found to contain a H2Trza and a lattic water molecule; complexes I and II are discrete mononuclear species. The central Co(II) and Mn(II) atoms exhibit octahedral coordinations, type 4 + 2. In two compounds, the coordination entities are further organized via hydrogenbonding interactions to generate uniform supramolecular networks. Thermal stabilities of two compounds were examined by thermogravimetric analysis.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471022, P.R. China

    Y. F. Wang & J. L. Geng

  2. School of Chemical Engineering, Guizhou University of Engineering Science, Bijie, 551700, P.R. China

    X. Y. Sun

Authors
  1. Y. F. Wang
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  2. X. Y. Sun
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  3. J. L. Geng
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Correspondence to Y. F. Wang.

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Wang, Y.F., Sun, X.Y. & Geng, J.L. Synthesis, crystal structures, and characterization of a new substituted 1,2,4-triazole and its two Co(II)/Mn(II) complexes. Russ J Coord Chem 42, 143–149 (2016). https://doi.org/10.1134/S1070328416020081

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  • DOI: https://doi.org/10.1134/S1070328416020081

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