Hydrothermal syntheses, structural characterizations and magnetic properties of cobalt(II) and manganese(II) coordination polymeric complexes containing pyrazinecarboxylate ligand |
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| Authors: | Yu-Cang LiangMao-Chun Hong Jia-Cheng LiuRong Cao |
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| Affiliation: | State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China |
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| Abstract: | Two novel coordination polymeric complexes [Co(pzca)2(H2O)]n (1) and [Mn(pzca)2]n (2) (pzca=2-pyrazinecarboxylate) have been synthesized by hydrothermal reaction of M(CH3COO)2·4H2O (M=Co, Mn) and 2-pyrazinecarboxylic acid. The complex 1 displays an infinite zigzag chain structure in which each cobalt(II) center was coordinated by three nitrogen and three oxygen atoms to generate a CoN3O3 octahedral geometry. The existence of hydrogen bond leads to the formation of the interpenetrating stacking structure. Complex 2 indicates a two-dimensional layer structure through the linkage of bridging oxygen atom of pzca ligand. Each Mn(II) center exhibits a distorted octahedral coordination environment with four oxygen atoms and two nitrogen atoms. The distances of adjacent Mn(II) atoms are 3.503 and 5.654 Å, respectively. The magnetic property analyses reveal that both complexes show weak antiferromagnetic exchange interactions between the metal centers. |
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| Keywords: | Cobalt coordination polymer Manganese coordination polymer Hydrothermal synthesis Crystal structures Magnetic property |
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