title: Anisotropic magnetic behavior of anionic Ce@C82 carbene adducts.
abstract: Derivatives of Ce@C(82)(C(2v)) have been synthesized and fully characterized, and their anisotropic magnetism has been observed as paramagnetic shifts in NMR measurements. Carbene addition by photochemical reaction afforded two isomers of Ce@C(82)(C(2v))Ad (Ad = adamantylidene), 2a and 2b, demonstrating high regioselectivity. The two isomers were characterized using MALDI-TOF mass spectrometry, vis-NIR absorption spectroscopy, (1)H and (13)C NMR spectroscopy, and electrochemistry. The structure of the minor isomer (2b) was elucidated by single-crystal X-ray structural analysis. (13)C and (1)H NMR measurements revealed the characteristic anisotropic interaction between the f electron on the Ce atom and nuclear spins of the carbon atoms of the cage and the protons of the Ad group, respectively.
authors.affiliation: Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
authors.forename: Yuta
authors.initials: Y
authors.lastname: Takano
authors.forename: Motoki
authors.initials: M
authors.lastname: Aoyagi
authors.forename: Michio
authors.initials: M
authors.lastname: Yamada
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Nikawa
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Slanina
authors.forename: Naomi
authors.initials: N
authors.lastname: Mizorogi
authors.forename: Midori O
authors.initials: MO
authors.lastname: Ishitsuka
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: Shigeru
authors.initials: S
authors.lastname: Nagase