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)ethanedichloride,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。
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2010年第11期2018-2024,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金项目(No.20662003,20961002)
教育部春晖计划项目
贵州省国际科技合作重点项目计划资助