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首页> 外文期刊>Inorganic Chemistry Communications >Square-planar nickel(II) complexes with a tridentate Schiff base and monodentate heterocycles: self-assembly to dimeric and one-dimensional array via hydrogen bonding
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Square-planar nickel(II) complexes with a tridentate Schiff base and monodentate heterocycles: self-assembly to dimeric and one-dimensional array via hydrogen bonding

机译:具有三齿席夫碱和单齿杂环的方形镍(II)配合物:通过氢键自组装成二聚体和一维阵列

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摘要

Two nickel(II) complexes having the general formula [Ni(bhac)L] with tridentate ONO-donor acetylacetone benzoylhydrazone (H_2bhac) and monodentate N-donor heterocycles (L = 3,5-dimethylpyrazole (Hdmptz) and imidazole (Himdaz)) are reported. The complexes were synthesized in ethanol media by reacting Ni(O_2CCH_3)_2·4H_2O, H_2bhac and L in 1:!:1 mole ratio and characterized by analytical, magnetic and spectroscopic methods. X-ray crystal structures of both complexes have been determined. In each complex, the metal ion is in square-planar N_2O_2 coordination geometry. In the solid state, a one-dimensional assembly of the [Ni(bhac)(Himidz)] molecules is formed via intermolecular hydrogen bonds between the imidazole N-H groups and the uncoordinated N-atoms of the deprotonated amide functionalities. On the other hand, two [Ni(bhac)(Hdmpz)] molecules are involved in a pair of complementary hdyrogen bonds between the pyrazole N-H groups and the coordinated O-atoms of the deprotonated amide functionalities forming a dinuclear species.
机译:两种具有通式[Ni(bhac)L]的镍(II)配合物,包括三齿ONO供体乙酰丙酮苯甲酰hydr(H_2bhac)和单齿N供体杂环(L = 3,5-二甲基吡唑(Hdmptz)和咪唑(Himdaz))被报道。 Ni(O_2CCH_3)_2·4H_2O,H_2bhac和L以1 ::: 1的摩尔比反应在乙醇介质中合成配合物,并通过分析,磁性和光谱法表征。已经确定了两种配合物的X射线晶体结构。在每个络合物中,金属离子均处于方形N_2O_2配位几何结构。在固态下,[Ni(bhac)(Himidz)]分子的一维组装是通过咪唑N-H基团与去质子化酰胺官能团的未配位N原子之间的分子间氢键形成的。另一方面,两个[Ni(bhac)(Hdmpz)]分子参与了吡唑N-H基团与去质子化酰胺官能团的配位O原子之间的一对互补氢原键,从而形成了双核物质。

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