| Literature DB >> 19526992 |
Yuta Takano1, Motoki Aoyagi, Michio Yamada, Hidefumi Nikawa, Zdenek Slanina, Naomi Mizorogi, Midori O Ishitsuka, Takahiro Tsuchiya, Yutaka Maeda, Takeshi Akasaka, Tatsuhisa Kato, Shigeru Nagase.
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.Entities:
Year: 2009 PMID： 19526992 DOI： 10.1021/ja902106a
Source DB: PubMed Journal: J Am Chem Soc ISSN： 0002-7863 Impact factor: 15.419