Bis(2-(1H-imidazol-2-yl)-pyridine)copper(II): Effects of counteranions on the molecular and supramolecular structures
Bis(2-(1H-imidazol-2-yl)-pyridine)copper(II): Effects of counteranions on the molecular and supramolecular structures
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双(2-(1H-咪唑-2-基)-吡啶)铜(II)：抗衡阴离子对分子和超分子结构的影响
DOI：
10.1016/j.poly.2010.08.034
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发表时间：
2010
期刊：
影响因子：
2.6
通讯作者：
S. Pal
中科院分区：
文献类型：
--
作者：
T. Ghosh;Sunirban Das;S. Pal
介绍了以氯化物、硝酸盐和高氯酸盐为反阴离子的双（2-（1h -咪唑-2-基）吡啶）铜（II）的合成及其物理性质。微分析，磁化率，电导率和各种光谱测量已被用于配合物的表征。这三种配合物的晶体结构都已确定。分子间氢键相互作用和由此产生的自组装模式的每一个物种已经仔细审查。含氯化物的配合物结晶为三水合物，其中金属离子处于四边形拉长的顺式n4cl2配位球中。该配合物通过N-H⋯Cl、O - h⋯Cl和O - h⋯O氢键提供三维蜂窝状结构。在含有硝酸盐的物质中，两个反阴离子中的一个与金属中心协调，提供不规则的n4o2配位球，而另一个反阴离子在晶格水分子的帮助下，通过N-H⋯O和分叉的O - h⋯O，O氢键组装成阶梯状结构。当高氯酸盐为反阴离子时，形成了一维聚合物。在这里，两种高氯酸盐中的一种充当了四边形反式n4o2配位球中金属中心之间的桥梁。该聚合链与第二高氯酸盐和水分子一起，由于N-H⋯O和O - h⋯O氢键而形成带状结构。
The synthesis and physical properties of bis(2-(1H-imidazol-2-yl)-pyridine)copper(II) with chloride, nitrate and perchlorate as counteranions have been described. Microanalysis, magnetic susceptibility, conductivity and various spectroscopic measurements have been used for the characterization of the complexes. The crystal structures of all three complexes have been determined. Intermolecular hydrogen-bonding interactions and the resulting self-assembly patterns for each of the species have been scrutinized. The chloride containing complex crystallizes as a trihydrate, where the metal ion is in a tetragonally elongated cis-N4Cl2coordination sphere. This complex provides a three-dimensional honeycomb-like structure through N–H⋯Cl, O–H⋯Cl and O–H⋯O hydrogen bonds. In the nitrate containing species, one of the two counteranions coordinates to the metal centre to provide an irregular N4O2coordination sphere, while the other counteranion, with the help of a lattice water molecule, assembles a ladder-like structure via N–H⋯O and bifurcated O–H⋯O,O hydrogen bonds. A one-dimensional polymeric species has been formed when perchlorate is the counteranion. Here one of the two perchlorates acts as a bridge between the metal centres that are in tetragonally elongated trans-N4O2coordination spheres. This polymeric chain, together with the second perchlorate and a water molecule, form a ribbon-like structure due to N–H⋯O and O–H⋯O hydrogen bonds.