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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Solution studies and structure of a dinuclear-based double-stranded helicate of [Cu-2(p-xysal)(2)] (H-2-p-xysal = bis (hydroxylbenzyl)diaminoxylene)
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Solution studies and structure of a dinuclear-based double-stranded helicate of [Cu-2(p-xysal)(2)] (H-2-p-xysal = bis (hydroxylbenzyl)diaminoxylene)

机译：[Cu-2（p-xysal）（2）]（H-2-p-xysal =双（羟基苄基）二氨基二甲苯）的双核双链螺旋的溶液研究和结构

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摘要

Reaction of a simple Schiff-base ligand bis(hydroxylbenzyl)diaminoxylene (H-2-p-xysal) with copper(II) perchlorate results in the formation of Cu-2(p-xysal)(2) with a double-stranded helicate structure, constructed from two slightly different units of dinuclear Cu(II), in which all the copper(II) ions have distorted tetrahedral geometries. The two sublattices are interpenetrating where the helix axes are oriented as the monoclinic angle (116.6degrees). ESI-MS measurement indicates that the complex may partially dissociate in solution. The EPR spectrum in a frozen CHCl3/MeOH solution shows that two different species are present. The spectrum has been satisfactory simulated with one mononuclear species and one dinuclear species. Cyclic voltammetry study shows a weakly reversible reduction wave of the Cu(II)/Cu(I) redox couple at E-1/2 = -0.915 V. There are two successive oxidation waves at E-pa = 0.94 and 1.25 V. The latter one appears to be weakly reversible and it is assigned to the one electron oxidation of the phenolate group. The intra- and inter-molecular interactions are demonstrated to play important roles in the formation and the stabilization of the molecular architectures of the complex. (C) 2004 Elsevier Ltd. All rights reserved.
机译：简单的席夫碱配体双（羟基苄基）二氨基二甲苯（H-2-对-乙醛）与高氯酸铜（II）反应导致形成Cu-2（对-乙醛）（2）与双链螺旋由两个略有不同的双核Cu（II）单元构成的结构，其中所有的铜（II）离子都扭曲了四面体的几何形状。两个子晶格互相贯穿，螺旋轴的方向为单斜角（116.6度）。 ESI-MS测量表明复合物可能在溶液中部分解离。冷冻的CHCl3 / MeOH溶液中的EPR光谱显示存在两种不同的物质。用一种单核物种和一种双核物种对光谱进行了令人满意的模拟。循环伏安法研究显示，在E-1 / 2 = -0.915 V时，Cu（II）/ Cu（I）氧化还原对具有弱可逆的还原波。在E-pa = 0.94和1.25 V时有两个连续的氧化波。后者似乎是弱可逆的，并且被分配给酚酸酯基团的一个电子氧化。分子内和分子间相互作用被证明在复合物分子结构的形成和稳定中起重要作用。 （C）2004 Elsevier Ltd.保留所有权利。

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