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以5-甲基-3-吡唑甲酸为配体,合成了1个单核锰(Ⅱ)配合物[Mn(HMPCA)2(phen)]·2H2O(1)和1个钴(Ⅱ)的一维配位聚合物{[Co(HMPCA)2(pyz)]·5H2O}n(2)(H2MPCA=5-甲基-3-吡唑甲酸;phen=1,10-菲咯啉;pyz=吡嗪),并用元素分析、红外光谱、X-射线单晶衍射结构分析、热重分析等对其进行了表征。配合物1属于正交晶系,空间群为Pbca,配合物2属于单斜晶系,空间群为P21/c。配合物1和2中的金属离子都位于1个畸变的八面体构型中。配合物1中的独立结构单元间通过分子间氢键作用构成1个三维结构。而在2中,每个吡嗪分子桥联2个相邻的钴(Ⅱ)离子,形成1个一维链;这些一维链和水分子通过分子间氢键进一步形成一个三维的结构。变温磁化率数据(300~1.8K)表明配合物2中的钴(Ⅱ)离子间存在弱的反铁磁性作用。
One mononuclear manganese (Ⅱ) complex [Mn (HMPCA) 2 (phen)] · 2H2O (1) and one cobalt (Ⅱ) were synthesized from 5-methyl- One-dimensional coordination polymer {[Co (HMPCA) 2 (pyz)] 5H2O} n (2) (H2MPCA = 5-methyl-3- pyrazolecarboxylic acid; Pyrazine) were synthesized and characterized by means of elemental analysis, IR, X-ray single crystal diffraction and thermogravimetric analysis. Complex 1 belongs to orthorhombic system, space group Pbca, complex 2 belongs to monoclinic system, space group P21 / c. The metal ions in complexes 1 and 2 are all located in a distorted octahedral configuration. A single three-dimensional structure was formed by the intermolecular hydrogen bonding between the independent structural units in complex 1. In 2, each pyrazine molecule bridges two adjacent cobalt (II) ions to form a one-dimensional chain; these one-dimensional chains and water molecules further form a three-dimensional structure by intermolecular hydrogen bonding. The data of temperature-dependent magnetic susceptibility (300 ~ 1.8K) show that there is a weak anti-ferromagnetic effect between the cobalt (Ⅱ) ions in complex 2.