Synthesis, Characterization, and Theoretical Study of Stable Isomers of C70(CF3)n (n = 2, 4, 6, 8, 10)
作者:Eugenii I. Dorozhkin、Daria V. Ignat'eva、Nadezhda B. Tamm、Alexey A. Goryunkov、Pavel A. Khavrel、Ilya N. Ioffe、Alexey A. Popov、Igor V. Kuvychko、Alexey V. Streletskiy、Vitaliy Y. Markov、Johann Spandl、Steven H. Strauss、Olga V. Boltalina
DOI:10.1002/chem.200501346
日期:2006.5.3
arranged on isolated para-C6(CF3)2 hexagons and/or on a ribbon of edge-sharing meta- and/or para-C6(CF3)2 hexagons. For Cs- and C2-C70(CF3)8 and for C2-C70(CF3)6, the ribbons straddle the C70 equatorial belt; for C1-C70(CF3)4, the para-meta-para ribbon includes three polar hexagons; for C1-7,24-C70(CF3)2, the para-C6(CF3)2 hexagon includes one of the carbon atoms on a C70 polar pentagon. The 10.3-16.2
C70与十当量的三氟乙酸银(I)在320-340摄氏度下反应,然后在420-540摄氏度进行部分升华,并且HPLC处理导致n = 2的C70(CF3)n单一丰富异构体的分离,4、6和10,以及C70(CF3)8的两个丰富的异构体。通过使用基质辅助激光解吸电离(MALDI)质谱,2D-COSY和/或1D 19F NMR光谱以及密度泛函理论(DFT)级别的量子化学计算,对这6种化合物进行了表征。一些还通过拉曼光谱法表征。明确地找到了分离出的化合物的加成模式为C1-7,24-C70(CF3)2,C1-7,24,44,47-C70(CF3)4,C2-1,4,11,19, 31,41-C70(CF3)6,Cs-1,4,11,19,31,41,51,64-C70(CF3)8,C2-1,4,11,19,31,41,51, 60-C70(CF3)8和C1-1,4,10,19,25,41,49,60,66,