X-ray crystallographic proof of the isomer D2-C84(5) as trifluoromethylated and chlorinated derivatives, C84(CF3)16, C84Cl20, and C84Cl32.
X-ray crystallographic proof of the isomer D2-C84(5) as trifluoromethylated and chlorinated derivatives, C84(CF3)16, C84Cl20, and C84Cl32.
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异构体 D2-C84(5) 作为三氟甲基化和氯化衍生物、C84(CF3)16、C84Cl20 和 C84Cl32 的 X 射线晶体学证明
DOI:
10.1002/chem.201103456
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
S. I. Troyanov
中科院分区:
文献类型:
--
作者:
S. Yang;C. Chen;T. Wei;N. B. Tamm;E. Kemnitz;S. I. Troyanov
With respect to C60 and C70, the isolation of much less abundant higher fullerenes is more difficult, but their chemistry has started to raise more interest. The characterization of higher fullerenes is complicated by the presence of a varying number of cage isomers. While only one isomer exists for C60 and for C70 complying with the isolated pentagon rule (IPR),[1] the number of possible IPR isomers increases rapidly with size for the higher fullerenes. Usually characterization of higher fullerenes is achieved by 13CNMR spectroscopy, but in many cases only molecular symmetry could be established.[2] This is not sufficient for the unambiguous structural elucidation of the cage isomer, because several isomers may exhibit the same molecular symmetry. Derivatization of higher fullerenes followed by separation of derivatives and the use of X-ray crystallographic methods for their characterization appeared to be rather effective as illustrated by some examples for C78–C96.[3]C84, the most abundant higher fullerene, has 24 possible IPR isomers.[1] Two major C84 isomers, nos. 22 and 23 (the numbering is based on the spiral algorithm [1]), were shown to be most abundant with the 2: 1 ratio to one another.[4] Several minor isomers (nos. 4, 5, 11, 14, 16, and 18) have been also found in fullerene mixtures produced by usual arc-discharge method.[2, 5] In most cases, cage connectivities of C84 isomers have been confirmed by X-ray crystallography of either C84 derivatives for isomers4,[5] 11,[3f, 5] 16,[5] 18,[5] 22,[5] and 23 [3e, 5] or pristine C84 co-crystallized with a metal porphyrin (isomer 14).[6]
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DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
Pavel A. Troshin;R. N. Lyubovskaya;Ilya N. Ioffe;Natalia B. Shustova;E. Kemnitz;Sergey I. Troyanov
通讯作者:
Sergey I. Troyanov
影响因子:
2.9
作者:
T. John S. Dennis;T. Kai;K. Asato;Tetsuo Tomiyama;H. Shinohara;Takuya Yoshida;Yuji Kobayashi;H. Ishiwatari;Y. Miyake;Koichi Kikuchi;Y. Achiba
通讯作者:
T. John S. Dennis;T. Kai;K. Asato;Tetsuo Tomiyama;H. Shinohara;Takuya Yoshida;Yuji Kobayashi;H. Ishiwatari;Y. Miyake;Koichi Kikuchi;Y. Achiba
影响因子:
--
作者:
K. Simeonov;K. Amsharov;E. Krokos;M. Jansen
通讯作者:
M. Jansen
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
S. Troyanov;N. Tamm
通讯作者:
N. Tamm
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
N. Tamm;S. Troyanov
通讯作者:
S. Troyanov