Synthesis, Structure and Thermal Behavior of a New Coordination Polymer Based on Mixed Pyrazine-2-carboxylate and Oxalate Ligands |
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Authors: | Lu Han Yan-Ru Ma Lai-Chen Chen Shu-Min Huo Tao-Run Qiu Rong-Hua Zeng Qun-Hui Meng and Yi-Fan Luo |
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Institution: | (1) School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, People’s Republic of China; |
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Abstract: | Abstract A new 4d–4f coordination polymer, AgGd(pyzc)2(ox)·H2O)] (1) pyzc = Pyrazine-2-carboxylate, ox = oxalate] has been successfully synthesized under hydrothermal conditions and structurally
determined by single-crystal X-ray diffraction, and characterized by elemental analysis, infrared spectroscopy, thermogravimetric
analysis and power X-ray diffraction. Single-crystal X-ray analysis reveals that it crystallizes in the monoclinic space group
P2
1
/c with a = 10.0746(1) ?, b = 18.642(1) ?, c = 8.0525(2) ?, β = 112.470(1)°, Mr = 617.34, Z = 4, V = 1505.6(2) ?3, μ = 5.732, F(000) = 1164. The Gd(III) ion is nine-coordinated by two O-donors and two N-donors of two different chelating pyzc ligands,
four O-donors of two different chelating oxalate ligands, and one O-donor of another carboxylate group of one pyzc ligand.
The compound represents a 3D microporous polymeric network constructed by gadolinium–oxalate chains and Ag-pyzc subunits. |
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