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Two-dimensional hydrogen-bonded polymer from nickel(II) tetraaza macrocyclic complex and succinate ligand

机译:镍(II)四氮杂大环配合物和琥珀酸酯配体的二维氢键聚合物

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摘要

The reaction of [Ni(L)]Cl_2?2H_2O (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,0~(1.18),0 ~(7.12)] docosane) with succinic acid (C_4H_6O _4) yields a 2D hydrogen-bonded polymer with formula [Ni(L)(C _4H_5O_4)_2] (1). This polymer complex has been characterized by X-ray crystallography, spectroscopy and cyclic voltammetry. The complex has a center of symmetry. The crystal structure of 1 exhibits a distorted octahedral geometry about Ni atom with four nitrogen atoms of the macrocycle and two oxygen atoms of the succinate ligand at the trans position. Compound 1 crystallizes in the monoclinic system C2/c with a = 14.8203(11), b = 12.3070(8), c = 17.4164(12) ?, β = 107.356(6)°, V = 3032.1(4) ?~3, Z = 4. Electronic spectrum of 1 reveals a high-spin octahedral environment. Cyclic voltammetry of 1 undergoes two waves of a one-electron transfer corresponding to Ni~(II)/Ni~(III) and Ni~(II)/Ni~I processes.
机译:[Ni(L)] Cl_2→2H_2O(L = 3,14-二甲基-2,6,13,17-四氮杂三环[14,4,0〜(1.18),0〜(7.12)]二十二烷的反应琥珀酸(C_4H_6O _4)生成二维氢键键合式[Ni(L)(C _4H_5O_4)_2](1)的聚合物。该聚合物配合物已通过X射线晶体学,光谱学和循环伏安法表征。该复合物具有对称中心。 1的晶体结构在Ni原子周围呈现扭曲的八面体几何形状,在大环上有四个氮原子,在反式位置有两个琥珀酸配体氧原子。化合物1在单斜晶系C2 / c中结晶,其a = 14.8203(11),b = 12.3070(8),c = 17.4164(12)α,β= 107.356(6)°,V = 3032.1(4)α〜3 ,Z =4。电子光谱为1时,显示出高自旋八面体环境。 1的循环伏安法经历了两次与Ni〜(II)/ Ni〜(III)和Ni〜(II)/ Ni〜I过程相对应的单电子转移波。

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