Solid-state [4+2] cycloaddition of fullerene C60 with condensed aromatics using a high-speed vibration milling technique

被引:122
作者
Murata, Y [1 ]
Kato, N [1 ]
Fujiwara, K [1 ]
Komatsu, K [1 ]
机构
[1] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan
关键词
D O I
10.1021/jo990013z
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The solid-state reaction using a high-speed vibration milling (HSVM) technique has been applied to the [4 + 2] cycloaddition of fullerene C-60 with condensed aromatics such as anthracenes, tetracene, pentacene, and naphtho[2,3-a]pyrene. From the reaction with anthracene, [4 + 2] cycloadduct 1 was obtained in better yield than the reaction in solution. Despite such heterogeneous solid-state reaction conditions, an equilibrium state appears to be attained between the reactants (C-60 and anthracene) and products (mono- and bisadducts) since essentially the same product mixture was obtained starting either from the reactants or from the monoadduct after 30 min of the HSVM reaction. The reaction with pentacene gave double C-60 adduct 4 with two C60 cages attached to a pentacene molecule, which cannot be obtained in the reaction in toluene solution, in addition to symmetrical monoadduct 3. The HSVM treatment of C-60 with 9, 10-dimethylanthracene, tetracene, or naphtho[2,3-a]pyrene also gave the corresponding [4 + 2] cycloadducts in fair yields. The redox properties of these adducts were investigated by the use of cyclic voltammetry.
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页码:3483 / 3488
页数:6
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