Chemical Derivatization of Fullerenes with Organosilicon Compounds

近年来，巴克敏斯特富勒烯的化学衍生化反应备受关注。在用于C&lt；60&gt；官能化的各种反应中，[2 1]、[2 2]、[2 3]、[2 4]和[2 8]环加成反应已成功地用于合成C&lt；60&gt；在所有情况下，C&lt；60；都扮演着亲双烯分子的角色。同时，光激C&lt；60&gt；是较强的电子受体，应变的Si-Si和Ge-Ge S键可以作为电子给体。在富勒烯与有机硅和锗化合物的化学衍生化研究过程中，我们发现C_&lt；60&gt；和C_&lt；70&gt；与二硅烷和二硅杂环的光化学[2，3]环加成反应发生了反应，并显示出激基络合物的中间体。

Much attention has been drawn to the chemical derivatization of buckminsterfullerene, C_<60> in recent years. Among various reactions to be used for the functionalization of C_<60>, [2+1], [2+2], [2+3], [2+4] and [2+8] cycloaddition reactions have been successfully employed for preparation of the ring-fused C_<60> derivatives. In all cases, C_<60> acts as a dienophile. Meanwhile, photo-excited C_<60> is a strong electron acceptor and strained Si-Si and Ge-Ge s bonds can act as an electron donor. During the course of our research on chemical derivatization of fullerenes with organosilicon and -germanium compounds, we found that photochemical [2+3] cycloaddition of C_<60> and C_<70> with a disilirane and a digermirane take place and can demonstrate the intermediacy of an exciplex.