COMPLEXATION OF THE CATIONS OF 6 ALKALIDES AND AN ELECTRIDE BY MIXED CROWN-ETHERS
COMPLEXATION OF THE CATIONS OF 6 ALKALIDES AND AN ELECTRIDE BY MIXED CROWN-ETHERS
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DOI：
10.1021/ja00074a019
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发表时间：
1993-10-20
影响因子：
15
通讯作者：
DYE, JL
中科院分区：
文献类型：
--
作者：
HUANG, RH;EGLIN, JL;DYE, JL
众所周知，冠醚与许多金属的阳离子形成夹心络合物，但迄今为止，相同的冠醚形成夹心的两半。合成了六种新的碱金属化合物和一种新的碱金属化合物，它们分别与18-冠-6（18 C6）、15-冠-5（15 C5）和12-冠-4（12 C4）形成混合夹心配合物。Cs+（18 C6）（15 C5）Na-和Cs+（18 C6）（15 C5）e-的性质证明了这些化学计量化合物的存在，但单晶X射线衍射研究仅得到了晶体系统和晶胞参数。测定了K+（18 C6）（12 C4）Na-、K+（18 C6）（12 C4）K-、K+（18 C6）（12 C4）K-、18 C6、Rb+（18 C6）（12 C4）Na-和Rb+（18 C6）（12 C4）Rb-的晶体结构，从而验证了混合夹心化合物相对于仅含有一种类型配位剂的“母体”化合物的热力学稳定性。
It is well-known that crown ethers form sandwich complexes with the cations of many metals, but to date, the same crown ether formed both halves of the sandwich. Six new alkalides and an electride have now been synthesized that contain mixed sandwich complexes of alkali metal cations with 18-crown-6 (18C6), 15-crown-5 (15C5), and 12-crown-4 (12C4). The properties of Cs+(18C6)(15C5)Na- and Cs+(18C6)(15C5)e- demonstrate the existence of these stoichiometric compounds, but single-crystal X-ray diffraction studies yielded only the crystal systems and cell parameters. The crystal structures of K+(18C6)(12C4)Na-, K+(18C6)(12C4)K-, K+(18C6)(12C4)K-.18C6, Rb+(18C6)(12C4)Na-, and Rb+(18C6)(12C4)Rb-were determined, thus verifying the thermodynamic stability of the mixed sandwich compounds relative to the ''parent' compounds that contain only one type of complexant.