Tamm Nadezhda B, Troyanov Sergey I
Chemistry Department, Moscow State University, Leninskie gory, 119991, Moscow, Russia.
Chem Asian J. 2015 Aug;10(8):1622-5. doi: 10.1002/asia.201500521. Epub 2015 Jun 25.
High-temperature trifluoromethylation of a C90 isomeric mixture with CF3 I followed by HPLC separation of C90 (CF3)n isomers resulted in the isolation of several individual C90 (CF3)14-18 compounds. Single crystal X-ray diffraction with the use of synchrotron radiation resulted in the structure determination of C90 (30)(CF3)14 , C90 (35)(CF3)16/18 , and C90 (45)(CF3)16/18 . Their addition patterns are discussed and compared with the known isomers C90 (30)(CF3)18 and C90 (35)(CF3)14 , respectively. The presence of the most stable C90 isomer, C90 (45), in the fullerene soot has been confirmed for the first time.
用CF₃I对C90异构体混合物进行高温三氟甲基化，随后通过高效液相色谱法分离C90(CF₃)ₙ异构体，从而分离出几种单独的C90(CF₃)₁₄ - ₁₈化合物。利用同步辐射进行单晶X射线衍射确定了C90(30)(CF₃)₁₄、C90(35)(CF₃)₁₆/₁₈和C90(45)(CF₃)₁₆/₁₈的结构。分别讨论了它们的加成模式，并与已知异构体C90(30)(CF₃)₁₈和C90(35)(CF₃)₁₄进行了比较。首次在富勒烯烟灰中证实了最稳定的C90异构体C90(45)的存在。
