六元瓜环-磷酸配合物的制备及晶体结构

Synthesis and Crystal Structure of Cucurbit[6]uril

瓜环与酸的配合物作为一种瓜环负载酸的新型负载型催化剂,而与瓜环负载磷钨酸、硅钨酸、磷钼酸等多酸不同,该类多酸价格相对较昂贵,而瓜环负载磷酸等简单无机酸价格低廉,将六元瓜环溶于磷酸制备Q6与磷酸的配合物,并对其晶体结构进行了表征,晶体结构表明,晶体属于单斜晶系,空间群为D2h,a=14.3197(9),b=18.6106(11),c=13.4352(8),α=90.00°,β=109.249(2)°,γ=90.00°,Z=2,R=0.0649,每个瓜环可以负载3个磷酸。

The coordination [CB]n- acid is a popular catalyzer which the cucurbiturils is loaded by acid. A new coordination with the cucurbiturils loaded by a kind of inorganic acid was reported,which was different from cucurbiturils loaded by a kind of polyoxometalates as phosphotungstic acid,tungstosilicic acid hydrate,phosphomolybdic acid hydrate,and so on. This kind of loaded- catalyzer was cheaper than cucurbiturils- polyoxometalates. One X- ray crystal was obtained from a solution containing cucurbit[6]uril（ Q[6]） with phosphate acid,and structurally characterized by single crystal X- ray diffraction. The experimental result of X- ray single crystal diffraction analysis revealed that the title compound belonged to monocline system with space group,a = 14. 3197（9）A°,b = 18. 6106（11）A°,c = 13. 4352（8）A°,α = 90. 00°,β = 109. 249（2） °,γ = 90. 00°,Z = 2,R = 0. 06. In this complex,the cucurbiturils can coordinate with three phosphoric acid.