A singly bonded derivative of endohedral metallofullerene: La@C82CBr(COOC2H5) |
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| Authors: | Feng Lai Nakahodo Tsukasa Wakahara Takatsugu Tsuchiya Takahiro Maeda Yutaka Akasaka Takeshi Kato Tatsuhisa Horn Ernst Yoza Kenji Mizorogi Naomi Nagase Shigeru |
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| Institution: | Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba 305-8577, Japan. |
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| Abstract: | A novel Bingel monoadduct of La@C82 (mono-A) has been synthesized by the reaction with diethyl bromomalonate in the presence of DBU (Bingel-Hirsch reaction). Its structure has been fully determined by NMR spectroscopic and X-ray crystallographic analyses. The most distinct feature of mono-A is the single bond moiety between the functional group and fullerene cage, which is very different from the cyclopropane moiety in a conventional Bingel adduct of empty fullerenes. Further spectroscopic characterizations and calculations revealed the closed-shell structure of mono-A. Its formation mechanism was discussed according to calculation results. |
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