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