Supramolecular Architectures and Hydrogen-Bond Directionalities of 4,4'-Biimidazole Metal Complexes Depending on Coordination Geometries
Supramolecular Architectures and Hydrogen-Bond Directionalities of 4,4'-Biimidazole Metal Complexes Depending on Coordination Geometries
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DOI：
10.1021/cg100958r
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发表时间：
2010-09
影响因子：
3.8
通讯作者：
T. Murata;Y. Yakiyama;K. Nakasuji;Y. Morita
中科院分区：
文献类型：
--
作者：
T. Murata;Y. Yakiyama;K. Nakasuji;Y. Morita
在 AgI、CuII 和 NiII 配合物中研究了 4,4'-联咪唑 (4,4'-H2Bim)（一种具有多向氢键的配体）的组装金属配合物。该系统最有趣的特征是氢键的方向性根据配体的顺式/反式构象和金属原子的配位几何形状而变化。 [AgI2(4,4'-H2Bim)3]络合物包括顺式和反式构象的配体，后者连接两个金属原子形成平面双核络合物。跨越抗衡阴离子 (X) 的三重 NH…X…H−N 氢键形成一维氢键链。 [CuII(4,4'-H2Bim)2]配合物通过两个具有顺式构象的4,4'-H2Bim单元的螯合配位而显示出方形平面配位球。该配合物通过抗衡阴离子或溶剂分子上的双 NH····X·H·N 氢键连接形成一维链。包含单去质子化配体的 [CuII(4,4'-HBim−)2] 具有...
Assembled metal complexes of 4,4′-biimidazole (4,4′-H2Bim), a ligand exhibiting multidirectional hydrogen-bonds, were investigated in AgI, CuII, and NiII complexes. The most intriguing feature of this system is that the directionality of hydrogen-bonds varies depending on the cis/trans-conformations of the ligand and the coordination geometries of the metal atoms. The [AgI2(4,4′-H2Bim)3] complex included ligands of both cis- and trans-conformations, the latter of which linked two metal atoms to form a planar dinuclear complex. The triple N−H···X···H−N hydrogen-bonds across the counteranions (X) formed a one-dimensional hydrogen-bond chain. The [CuII(4,4′-H2Bim)2] complexes showed a square-planar coordination sphere by the chelating coordination of two 4,4′-H2Bim units having the cis-conformation. The complexes were linked by the double N−H···X···H−N hydrogen-bonds across counteranions or solvent molecules to form one-dimensional chains. The [CuII(4,4′-HBim−)2] including the monodeprotonated ligand had a s...