Host–guest inclusion complexes of four partial alkyl-substituted cucurbit[6]urils with some probe guests

✍ Scribed by Da-Hai Yu; Xin-Long Ni; Zhong-Cheng Tian; Yun-Qin Zhang; Sai-Feng Xue; Zhu Tao; Qing-Jiang Zhu

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 779 KB
• Volume: 891
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2008.03.045

✦ Synopsis

Using probe guests, three host-guest inclusion complexes of two new alkyl-substituted cucurbit[6]uril hosts, ortho-tetramethyl cucurbit ) and symmetrical tetracyclohexano cucurbit[6]uril (TCyHQ[6]) have been characterized successfully by single crystal X-ray diffractions. They are {o-

and {TCyHQ[6]-dioxane}14H 2 O (3). Moreover, two similar crystal structure of two inclusion complexes of other two partial substituted cucurbit[6]urils, meta-hexamethyl cucurbit[6]uril (m-HMeQ[6]) and symmetrical dicyclohexano cucurbit[6]uril (p-(CyH) 2 Q[6]) with HCl salt of DMBPY were also reported. They were 5). The driving force for the information of the host-guest inclusion complexes can be attributed to not only the cavity interaction (host), but also the hydrogen bonding and ion-dipole interaction between the carbonyl oxygen at the portals of the host and the protonated nitrogen of the guest.