A singly bonded derivative of endohedral metallofullerene: La@C82CBr(COOC2H5).
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.
Feng
Lai
L
Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba 305-8577, Japan.
Nakahodo
Tsukasa
T
Wakahara
Takatsugu
T
Tsuchiya
Takahiro
T
Maeda
Yutaka
Y
Akasaka
Takeshi
T
Kato
Tatsuhisa
T
Horn
Ernst
E
Yoza
Kenji
K
Mizorogi
Naomi
N
Nagase
Shigeru
S