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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Hydrothermal synthesis and characterization of the first oxalate-bta mixed-Iigand three-dimensional frameworks:{[M_2(mu_8-bta)(mu_2-C_2O_4)] centre dot(H_3O)_2(H_2O)_2}_n(M = Co~II,Fe~II;bta = benzene-l,2,4,5-tetracarboxylate)
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Hydrothermal synthesis and characterization of the first oxalate-bta mixed-Iigand three-dimensional frameworks:{[M_2(mu_8-bta)(mu_2-C_2O_4)] centre dot(H_3O)_2(H_2O)_2}_n(M = Co~II,Fe~II;bta = benzene-l,2,4,5-tetracarboxylate)

机译：草酸-bta混合配体三维构架的水热合成与表征：{[M_2（mu_8-bta）（mu_2-C_2O_4）]中心点（H_3O）_2（H_2O）_2} _n（M = Co〜II ，Fe〜II; bta =苯-1,2,4,5-四羧酸酯）

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摘要

Two new metal-organic complexes formulated as {M_2(mu_8-bta)(mu_2-C_2O_4)centre dot(H_3O)_2(H_2O)_2}_n(1:M = Co~II;2:M = Fe~II;bta = benzene-1,2,4,5-tetracarboxylate)have been hydrothermally synthesized at 160 deg C for 120 h.Their structures were determined by single-crystal X-ray diffraction analysis and characterized by XPS,IR,ICP,elemental,TG and magnetic analysis.Complexes 1 and 2 are isostructural and represent the first coordination network structure constructed by bridging oxalate and bta mixed ligands.In the crystallographic independent unit each metal ion center is in a distorted octahedral geometry and coordinated by four O atoms from the four COO groups of four bta ligands and by two other O atoms from a bis-chelating oxalate ligand.The interconnected independent units create different types of channels running in different directions.The complexes 1 and 2 contain helical chains composed of left-handed and right-handed helices interlaced in pairs.Uncoordinated water molecules occupy the channels in the two complexes.Both of the complexes have intramolecular antiferromagnetic interactions.
机译：两种新的金属有机配合物配制成{M_2（mu_8-bta）（mu_2-C_2O_4）中心点（H_3O）_2（H_2O）_2} _n（1：M = Co〜II; 2：M = Fe〜II; bta = 1,2-，4,5-四羧酸苯酯）在160℃水热合成120 h。通过单晶X射线衍射分析确定其结构，并通过XPS，IR，ICP，元素，TG表征络合物1和2是同构结构，代表通过草酸盐和bta混合配体的桥接而建立的第一个配位网络结构。在晶体学独立单元中，每个金属离子中心呈扭曲的八面体几何形状，并由四个中的四个O原子进行配位双螯合草酸酯配体的四个bta配体和另外两个O原子的COO基团。相互连接的独立单元形成沿不同方向延伸的不同类型的通道。配合物1和2包含由左手和右手组成的螺旋链成对交织的螺旋。不协调的水分子它们占据了两个复合物中的通道。这两个复合物中均具有分子内反铁磁相互作用。

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