Trifluoromethyl Derivatives of Elusive Fullerene C98 |
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| Authors: | Dr. Nadezhda B. Tamm Runnan Guan Prof. Shangfeng Yang Prof. Sergey I. Troyanov |
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| Affiliation: | 1. Chemistry Department, Moscow State University, Leninskie gory, 119991 Moscow, Russia;2. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China (USTC), Hefei, 230026 P.R. China |
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| Abstract: | Data concerning the isomeric composition of C98 and the chemistry of C98 derivatives are scarce due to very low abundance of C98 in the fullerene soot. Trifluoromethylation of C98-containing mixtures followed by HPLC separation of CF3 derivatives and single crystal X-ray diffraction study resulted in structural characterization of four compounds C98(248)(CF3)18/20, C98(116)(CF3)18, and C98(120)(CF3)20. To date, these compounds represent the largest fullerenes isolated as CF3 derivatives with experimentally determined molecular structures. The addition patterns of C98(CF3)18/20 are discussed in detail revealing the stabilizing factors, such as isolated double C=C bonds and benzenoid rings on C98 fullerene cages. A detailed comparison with the addition patterns of the known C98Cln allowed us to contribute to the better understanding the chemistry of elusive C98 fullerene. |
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| Keywords: | addition pattern fullerenes HPLC separation structure elucidation trifluoromethylation |
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