配体N,N'-1,5-二(吡啶基甲基)羰基腙(H2L)单核铽(III)配合物的合成、光谱及x射线结构测定

T. Seck, M. Gueye, I. Thiam, O. Diouf, M. Gaye, P. Retailleau
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引用次数: 0

摘要

在标题化合物[Tb(H2L)2(H2O)3]. 3cl .4(H2O).(C2H5OH)中,Tb3+由四个氮原子、两个氧原子(来自三叉齿N,N'-1,5-二(吡啶基甲基)羰基腙)(H2L)的配体分子和三个氧原子(来自配位水分子)以扭曲的单包方形反棱镜结构九配位。x射线衍射分析证实了配合物的结构。通过乙醇溶液的缓慢蒸发生长出合适的晶体。该化合物在三斜晶系中结晶,具有p_空间群。该化合物的不对称单元包含两个中性配体分子、一个铽离子、三个配位水分子、五个半不配位水分子和一个不配位乙醇分子。在晶体中,复杂的阳离子通过氢键连接成层。这些层、氯离子和非配位水分子通过O - h··O、O - h··N、O - h··Cl、N - h··O、N - h··Cl和C-H··Cl氢键连接成三维结构。
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Synthesis, Spectroscopic and X-Ray Structure Determination of a New Mononuclear Terbium (III) Complex from the Ligand N,N'-1,5-bis(pyridylmethylidene) Carbonohydrazone (H2L)
In the title compound, [Tb(H2L)2(H2O)3].3Cl.4(H2O).(C2H5OH), the Tb3+ is nine-coordinated in a distorted monocapped square antiprismgeometry by four nitrogen atoms, two oxygen atoms from the ligand molecules of the tridentate N,N'-1,5-bis(pyridylmethylidene) carbonohydrazone) (H2L) and three oxygen atoms of coordinating water molecules. The structure of the complex was elucidated by X-ray diffraction analysis. Suitable crystals were grown by slow evaporation of ethanol solution. The compound crystallizes in the triclinic crystal system with a space group of Pī. The asymmetric unit of the compound contains two neutral ligand molecules, oneterbium ion, three coordinated water molecules, five and half uncoordinated water molecules and one uncoordinated ethanol molecule. In the crystal, the complex cations are linked by hydrogen bonds into layers. These layers, chloride anions and non-coordinating water molecules are connected by O—H···O, O—H···N, O—H···Cl, N—H···O, N—H···Cl and C—H···Cl hydrogen bonds into a three-dimensional structure.
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