Syntheses and Structures of Two Isomorphous Metal-organic Coordination Complexes Based on 4-Pyrimidin-5-ylbenzoic Acid |
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| Authors: | LI Ya-Feng LUO Jun-Hua |
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| Institution: | Key Laboratory of Optoelectronic Materials Chemistry and Physics, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, and National Engineering Research Center for Optoelectronic Crystalline Materials, Fuzhou, Fujian 350002, China |
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| Abstract: | The reactions of 4-pyrimidin-5-ylbenzoic acid (HL) with Co(NO_3) _2·6H_2O and Ni(NO_3) _2·6H_2O gave rise to two isomorphous mononuclear coordination complexes, namely, CoL_2(H_2O) _4] (1) and NiL_2(H_2O) _4] (2). Both compounds were characterized by IR spectroscopy and single-crystal X-ray diffraction. X-ray crystallographic analyses reveal that they crystallize in monoclinic, space group P2_(1/n). In the crystal structures of these two complexes, only one nitrogen atom of L coordinates to the metal center, and neither carboxylate group nor another nitrogen atom of L links to Co(Ⅱ) or Ni(Ⅱ). 2D Layers with significant hydrogen bonds can be observed, and they are further linked by L to form a 3D supramolecular network. Nitrogen atoms are not involved in forming hydrogen bonds, but carboxylic groups of the ligands play an important role in the configuration of this hydrogen-bond layer. |
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| Keywords: | crystal structure hydrogen bond cobalt complex nickel complex |
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