Supramolecular approach to crystallization of polynuclear chromium(III) aqua hydroxo complexes: synthesis and crystal structures of complexes [Cr2(OH)2(H2O)8]4+ and [Cr4(OH)6(H2O)12]6+ with cucurbit[n]uril (n = 7, 8)
Supramolecular approach to crystallization of polynuclear chromium(III) aqua hydroxo complexes: synthesis and crystal structures of complexes [Cr2(OH)2(H2O)8]4+ and [Cr4(OH)6(H2O)12]6+ with cucurbit[n]uril (n = 7, 8)
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DOI：
10.1007/s11172-007-0307-6
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发表时间：
2007-10
影响因子：
1.7
通讯作者：
O. A. Gerasko-;E. A. Mainicheva;D. Naumov;V. Fedin
中科院分区：
文献类型：
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作者：
O. A. Gerasko-;E. A. Mainicheva;D. Naumov;V. Fedin
组成为{[Cr2（OH）2（H2O）8]的超分子化合物（C42 H42 N28 O 14）2}-（NO3）4·18.75H2O（1）和{[Cr 4（OH）6（H2O）12]以硝酸铬（III）和大环空腔瓜环为原料，合成了（C48 H48 N32 O 16）3（NO3）6·55 H2O（2（C6 nH 6 nN 4 nO 2n，其中n分别= 7或8）。根据X射线衍射研究，多核铬水溶液配合物位于葫芦[n]脲分子形成的空腔中，并通过聚阳离子的羟基和水溶液配体与门户之间的氢键与这些分子连接。大环的氧原子。化合物1是第一个瓜环[7]与金属水配合物的超分子化合物。通过分离出葫芦[8]脲2的超分子加合物，确定了具有金刚烷结构的四核铬水配合物[Cr 4（μ2-OH）6（H2O）12]6+的结构。
Supramolecular compounds of the compositions {[Cr2(OH)2(H2O)8](C42H42N28O14)2}-(NO3)4·18.75H2O (1) and {[Cr4(OH)6(H2O)12](C48H48N32O16)3(NO3)6·55H2O (2) were synthesized from aqueous solutions of chromium(III) nitrate and the macrocyclic cavitand cucurbit[n]uril (C6nH6nN4nO2n, wheren= 7 or 8, respectively). According to the X-ray diffraction study, the polynuclear chromium aqua complexes are disposed in cavities formed by the cucurbit[n]uril molecules and are linked to these molecules through hydrogen bonds between the hydroxo and aqua ligands of the polycations and the portal oxygen atoms of the macrocycles. Compound1is the first example of supramolecular compounds of cucurbit[7]uril with metal aqua complexes. The isolation of the supramolecular adduct with cucurbit[8]uril2in the single-crystalline state allows the determination of the structure of the tetranuclear chromium aqua complex having an adamantane-like structure, [Cr4(μ2-OH)6(H2O)12]6+, which has been previously unknown in the solid state.