Zinc(II) Complexes with Thiadiazole-1,3,4 Derivatives

IF 1.8 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Russian Journal of Inorganic Chemistry Pub Date : 2024-07-03 DOI:10.1134/s0036023623602805

K. Sh. Khusenov, B. B. Umarov, K. K. Turgunov, O. Zh. Bakhronova, T. B. Aliev, B. T. Ibragimov

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Abstract

Zn(II) complexes [ZnL\(_{2}^{n}\)Х₂] and [ZnL\(_{3}^{n}\)(NO₃)₂], where n = 1, 2; X = Cl, Br, I; L¹ is 2-aminothiadiazole-1,3,4, and L² is 2-amino-5-methylthiadiazole-1,3,4, have been synthesized. The resulting complexes have been studied using elemental analysis, IR and ¹H NMR spectroscopies. The structure of complex [ZnL\(_{2}^{2}\)Br₂] has been determined by X-ray diffraction (CIF file CCDC no. 2251742). It has been found that the ligand molecules of 2-amino-5-R-thiadiazoles-1,3,4 (R = –H, –CH₃) are coordinated monodentately by the endocyclic nitrogen atom located in the α-position to the amino group. The polyhedron of the central atom of halide complexes is a slightly distorted tetrahedron, the coordination sphere of which is formed by two halide atoms and two endocyclic nitrogen atoms. According to the spectral data, during complexation in a solution of complex [ZnL\(_{2}^{2}\)Br₂], coordinated ligands L² undergo amino-imine tautomerism to form a heterocyclic amine with a nitrogen atom in the heterocycle. The polyhedron of the central atom for nitrate complexes is a slightly distorted trigonal bipyramid, in the coordination sphere of which three nitrogen atoms of the ligands are located in the equatorial plane and two oxygen atoms of two nitrate anions are located in the axial position.

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锌（II）与噻二唑-1,3,4 衍生物的配合物

摘要合成了锌(II)配合物[ZnL\(_{2}^{n}\)Х2] 和 [ZnL\(_{3}^{n}\)(NO3)2]，其中 n = 1, 2; X = Cl, Br, I; L1 是 2-氨基噻二唑-1,3,4，L2 是 2-氨基-5-甲基噻二唑-1,3,4。利用元素分析、红外光谱和 1H NMR 光谱对所得复合物进行了研究。复合物 [ZnL\(_{2}^{2}\)Br2] 的结构已通过 X 射线衍射测定（CIF 文件 CCDC 编号：2251742）。研究发现，2-氨基-5-R-噻二唑-1,3,4（R = -H，-CH3）的配体分子通过位于氨基 α 位的内环氮原子与氨基单配位。卤化物配合物中心原子的多面体是一个略微畸变的四面体，其配位圈由两个卤化物原子和两个内环氮原子构成。根据光谱数据，在[ZnL\(_{2}^{2}\)Br2]络合物溶液中进行络合时，配位配体 L2 会发生氨基-亚胺同分异构反应，形成杂环胺，杂环中含有一个氮原子。硝酸盐配合物中心原子的多面体是一个略微变形的三叉二棱锥，在其配位层中，配体的三个氮原子位于赤道平面，而两个硝酸盐阴离子的两个氧原子位于轴向位置。

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来源期刊

Russian Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

3.10

自引率

38.10%

发文量

237

审稿时长

3 months

期刊介绍： Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.