Two new transition metal complexes of [M(OH2)(HDPA)2]·3H2O (M=Mn(1); M=Co(2)) (H2DPA, 2,6-pyridine-dicarboxylic acid) have been prepared at room temperature from the reaction of MCl2·6H2O (M=Mn or Co) and H2DPA in the mixed solvent of H2O and EtOH in the presence of piperazine, and were characterized by X-ray analysis, elemental analysis. X-ray analysis reveals that the coordination geometries of Mn2+ and Co2+ are of octahedron and severely distorted square-based pyramid, respectively. Crystal data: [Mn(OH2)(HDPA)2]·3H2O (1), Mr=459.23, monoclinic, P2(1)/n, a=7.0056(3), b=(23.8125(12), c=10.7444(3) Å, β=99.834(2)°, Z=4, V=1766.28(13) Å3, R 1=0.0586, wR 2=0.1448 [I>2σ(I)]; Co(OH2)(HDPA)2]·3H2O (2), Mr=463.22, monoclinic, P2(1)/n, a=7.0014(2), b=23.8346(7), c=10.7212(4) Å, β=99.8540(10)°, Z=4, V=1762.71(10) Å3, R 1=0.0474, wR 2=0.1366 [I>2σ(I)].
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The work was supported by the financial support of Liaocheng University (31801) and Professor Jianmin Dou
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Liu, Y., Dou, J., Wang, D. et al. Synthesis and crystal structures of two new complexes [M(OH2)(HDPA)2]·3H2O (M = Mn, Co). J Chem Crystallogr 36, 613–618 (2006). https://doi.org/10.1007/s10870-006-9079-3
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DOI: https://doi.org/10.1007/s10870-006-9079-3