ESR study on the reactivity of two isomers of LaC82 with disilirane
ESR study on the reactivity of two isomers of LaC82 with disilirane
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LaC82两种异构体与二硅烷反应活性的ESR研究
DOI：
10.1007/bf03162060
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发表时间：
1996
影响因子：
1
通讯作者：
Takeshi Takahashi
中科院分区：
文献类型：
--
作者：
T. Kato;T. Akasaka;K. Kobayashi;S. Nagase;Kazunori Yamamoto;H. Funasaka;Takeshi Takahashi
我们观察到二硅烷与LaC82-A异构体的光化学和热加成反应，得到了新的ESR活性物种。光反应和热反应中加合物的ESR谱均可用至少6个八重态组分很好地模拟，并确定了六个八重态组分的各向同性La耦合常数和g因子。另一方面，LaC82-B异构体与二硅烷反应不产生ESR活性物种。这一事实也得到了质谱学测量的证实。这两种异构体与二硅烷的不同反应活性并不能用一种流行的观点来解释，即这两种异构体具有不同的C82笼形结构，但我们建议应该重新考察金属富勒烯的异构体的来源。
We observed photochemical and thermal addition of disilirane to the LaC82-A isomer, which give new ESR active species. Both ESR spectra of the adducts in photo- and thermal reactions are well simulated by at least six octet components, and the isotropic La coupling constants and g-factors of the six octet components are determined. On the other hand, the reaction of the LaC82-B isomer with disilirane gives no ESR active species. This fact is also verified by mass spectroscopic measurements. The different reactivities with disilirane of the two isomers are not interpreted by a popular view that the two isomers have a different C82 cage structure, but we rather suggest that the origin of the isomers of metallofullerenes should be re-examined.