| 两种部分甲基取代瓜环配合物的晶体结构(英文) | |
| Crystal Structures of Two Partially Methyl-Substituted Cucurbit[n]urils | |
| 摘要: 本文报道了2种新的部分甲基取代瓜环配合物的晶体结构，利用X-射线单晶衍射技术表征了2种配合物的结构，在CdCl2溶液中，1，2，4，5-八甲基六元瓜环选择性的包结客体分子1，2-(2，2′-bisbenzimidazolyl)ethane dichloride，形成2∶1的哑铃型主客体包结配合物；而1，2，4-六甲基五元瓜环(HMeQ[5])与钠离子配位形成包结一个水分子的“分子胶囊”，“分子胶囊”之间通过氢键自组装形成一维的超分子长链。 | |
| 关键词: 部分甲基取代瓜环 1，2，4，5-八甲基取代六元瓜环 1，2，4-六甲基取代五元瓜环 晶体结构 | |
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| Abstract: Two partial methyl-substituted cucurbit[n]urils were characterized by single-crystal X-ray diffractions. A new methyl-substituted cucurbituril, 1,2,4,5-octamethylcucurbit[6]uril (OMeQ[6]) was separated by the formation of the inclusion complexes of OMeQ[6] with 1,2-(2,2′-bisbenzimidazolyl)ethane dichloride (SBE) in the presence of CdCl2, and a 1,2,4-hexamethylcucurbit[5]uril (HMeQ[5]) coordination to sodium ion was also obtained. In the crystal structure of compound {(SBE@2OMeQ[6])2+[Cd2( μ-Cl)2(Cl2)2(H2O)2]2-} (1), the OMeQ[6] host selectively included the benzimidazolyl moiety of the guest SBE through the hydrophobic cavity interaction and the ion-dipole interaction of the cation N+ with the carbonyl oxygens of the host, and formed a dumbbell shape host-guest inclusion complex with a ratio of 2∶1. In the crystal structure of the complex {[Na(H2O)HMeQ[5]]+(NO3)-5H2O} (2), a molecular capsule included one water molecule was formed, and the capsules assembled one-dimensional supramolecular chain through the hydrogen bonding. CCDC: 760759, 1; 760758, 2. | |
| Keywords: partial methyl-substituted cucurbit[n]urils 1,2,4,5-octamethylcucurbit[6]uril 1,2,4-hexamethylcucurbit[5]uril crystal structures | |
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| 陈文建,曾金萍,张云黔,祝黔江,薛赛凤,陶 朱,卫 钢.两种部分甲基取代瓜环配合物的晶体结构(英文)[J].无机化学学报,2010,26(11):2018-2024. | |
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