A novel two-dimensional framework based on unprecedented cadmium(II) chains.
A novel two-dimensional framework based on unprecedented cadmium(II) chains.
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DOI：
10.1107/s0108270109000341
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发表时间：
2009-02
期刊：
影响因子：
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通讯作者：
J. Qin;Jianping Ma;Li Liu;Ru-Qi Huang;Yu‐Bin Dong
中科院分区：
文献类型：
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作者：
J. Qin;Jianping Ma;Li Liu;Ru-Qi Huang;Yu‐Bin Dong
弯曲配体4-[利用1H-1，2，4-三唑-1-基）甲基]苯甲酸（HL）合成了新型二维配位聚合物聚[mu（2）-水-mu（2）-氯-{mu（2）-4-[[（1H-1，2，4-triazol-1-yl）methyl]benzoato}cadmium（II）]，[Cd（C（10）H（8）N（3）O（2））Cl（H（2）O）]（n）.晶体学上独特的镉原子是七配位的两个羧酸根O原子，两个水O原子，两个Cl原子和一个三唑N原子的近似五角双锥环境。一个显著的特征是锯齿形的存在... CD... CD...无机链，其中相邻的Cd（II）离子以交替的方式通过μ（2）-Cl原子和μ（2）-H（2）O配体对双重桥接。据作者所知，这是第一个在镉（II）框架中包含这种桥接模式的例子。链通过桥接L（-）配体彼此连接成二维波状网络。所有的二维网络都精确地叠加在一起，AA...沿晶体学B轴沿着堆叠顺序。相邻层通过层间氢键相互作用进一步连接成三维框架。
The bent ligand 4-[(1H-1,2,4-triazol-1-yl)methyl]benzoic acid (HL) has been used to create the novel two-dimensional coordination polymer poly[mu(2)-aqua-mu(2)-chlorido-{mu(2)-4-[(1H-1,2,4-triazol-1-yl)methyl]benzoato}cadmium(II)], [Cd(C(10)H(8)N(3)O(2))Cl(H(2)O)](n), under hydrothermal reaction of HL with cadmium chloride. The crystallographically unique Cd atom is seven-coordinated in an approximately pentagonal-bipyramidal environment of two carboxylate O atoms, two water O atoms, two Cl atoms and one triazole N atom. A notable feature is the presence of zigzag ...Cd...Cd... inorganic chains, in which neighboring Cd(II) ions are doubly bridged by pairs of mu(2)-Cl atoms and mu(2)-H(2)O ligands in an alternating fashion. To the authors' knowledge, this is the first example containing this bridging mode in a cadmium(II) framework. The chains are connected to one another through the bridging L(-) ligand into a two-dimensional undulating network. All of the two-dimensional nets stack exactly together in an ...AA... stacking sequence along the crystallographic b axis. Neighboring layers are further linked into a three-dimensional framework via interlayer hydrogen-bonding interactions.