期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 11, 期 5, 页码 1603-1609出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200401040
关键词
alkynes; cyclophanes; fullerenes; macrocycles; polycycles
Multicyclic cagelike cyclophanes 2a and 2b containing cyclobutene rings have been prepared as precursors of three-dimensional polyynes C78H18 (1a) and C78H12Cl6 (1b), respectively. Laser irradiation of 2a and 2b induced expulsion of the aromatic fragment, indane, to give the three-dimensional polyyne anions C78H18- and C78H12Cl6-, respectively. Whereas the former anion lost only four hydrogen atoms to form C78H14-, complete loss of all hydrogen and chlorine atoms was observed from the latter anion, to yield a C-78(-) ion that has a fullerene structure which was proven by its characteristic fragmentation pattern.
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