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配位化合物雙(4-羧酸吡啶-2-羧酸根)銅(II)二結晶水合成及晶體結構分析

Synthesis and Crystal Structure of Complex Bis (4-carboxypyridine-2-carboxylato) copper (Ⅱ) dihydrate

摘要


將CuCl2.2H2O、吡啶-2,4-雙羧酸和1,10-菲羅啉加水混合,利用水熱合成反應,得到單核的銅(Ⅱ)錯合物,其化學式為[Cu(pdaH)2].2H2O(1)(其中pdaH2=吡啶-2,4-雙羧酸)。利用X-Ray晶體繞射儀、FT-IR光譜儀、示差掃瞄量熱儀及元素分析儀,測定產物晶體結構及性質,結果顯示化合物(1)是以銅(Ⅱ)離子為配位中心,含兩個O原子,以及兩個N原子,和兩個未配位水分子;氧原子分別來自兩個吡啶雙羧酸上的第二位置的O原子,氮原子分別為兩個雙羧酸吡啶環上的氮原子,配位構成平面四方型的幾何結構。由於吡啶雙羧酸及配位水分子,經由分子間的氫鍵作用(O-H・・・O),亦有O-H・・・π及C-H・・・π吡啶環間的吸引力,自組裝成3-D高分子化合物。

並列摘要


The title compound, [Cu(pdaH)2].2H2O (1) (pdaH2 = pyridine-2, 4-dicarboxylic acid), was obtained by the reaction of copper (Ⅱ) chloride dihydrate with pdaH2 and 1, 10-phenanthroline. The title compound was characterized by single crystal X-ray diffraction, FT-IR spectroscopy, elemental analysis and differential scanning calorimeter. The copper (Ⅱ) ion is coordinated by two oxygen atoms from two pdaH2 ligand are belong to carboxyl acid (at pyridine 2 position), two nitrogen atoms from two pdaH2 ligand and two uncoordinated water molecules, respectively, showing a square-planar geometry. In addition, the intermolecular O-H⋅⋅⋅O hydrogen-bonding and C-O⋅⋅⋅π, O-H⋅⋅⋅π stacking interactions further extend the title complexes, forming 3-D structures.

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