Syntheses and Characterization of Three New Compounds Based on Terephthalate and 2‐(2‐Pyridin‐4‐yl‐vinyl)benzimidazole Ligands |
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Authors: | Chang‐Kun Xia Chao Wei Yun‐Long Wu Fan Wu Shen Yang Jia‐Li Ma |
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Institution: | School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China |
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Abstract: | Three new compounds based on H2BDC and PyBImE H2BDC = 1,4‐benzenedicarboxylatic acid, PyBImE = 2‐(2‐pyridin‐4‐yl‐vinyl)benzimidazole], namely, Co(PyBImE)(BDC)(H2O)2] ( 1 ), Co(PyBImE)2(HBDC)(BDC)0.5] ( 2 ), and (HPyBImE)+ · (BDC)2–0.5 · (H2BDC)0.5] ( 3 ), were synthesized by hydrothermal methods and characterized by single‐crystal X‐ray diffraction. Compound 1 is a one‐dimensional chain bridged by terephthalate in a bis(monodentate) fashion. In the complex the nitrogen atom from NBIm and the coordination water molecule complete the coordination sphere. In complex 2 , the dinuclear cobalt units are bridged by terephthalate in a bis(bidentate) fashion into a one‐dimensional chain, but different from complex 1 , the nitrogen atom from NPy and the oxygen atom from hydrogenterephthalate complete the coordination sphere. Complex 3 is a co‐crystal with PyBImE and H2BDC in a 1:1 ratio and the transfer of hydrogen atoms leads the complex into a salt. Interesting supramolecular structures are shown due to the hydrogen bonding as well as π ··· π interactions in the three complexes. Thermal and magnetic properties of 1 and 2 were also studied. |
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Keywords: | 2‐(2‐Pyridin‐4‐yl‐vinyl)benzimidazole) Terephthalate Crystal structure Magnetic properties Cobalt |
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