Preparation, Structural Determination, and Characterization of Electronic Properties of Bis‐silylated and Bis‐germylated Lu
<sub>3</sub>
N@
<i>
I
<sub>h</sub>
</i>
‐C
<sub>80</sub>
作者:Masahiro Kako、Kyosuke Miyabe、Kumiko Sato、Mitsuaki Suzuki、Naomi Mizorogi、Wei‐Wei Wang、Michio Yamada、Yutaka Maeda、Marilyn M. Olmstead、Alan L. Balch、Shigeru Nagase、Takeshi Akasaka
DOI:10.1002/chem.201502511
日期:2015.11.9
Bis‐silylated and bis‐germylated derivatives of Lu3N@Ih‐C80 (3, 4, 5) were successfully synthesized by the photochemical addition of disiliranes 1 a, 1 b or digermirane 2, and fully characterized by spectroscopic, electrochemical, and theoretical studies. Interestingly, digermirane 2 reacts more efficiently than disiliranes 1 a and 1 b because of its good electron‐donor properties and lower steric
双-甲硅烷基化和双germylated路的衍生物3 N - [我ħ -C 80(3,4,5)通过光化学加成disiliranes的成功地合成1,图1b或digermirane 2,并通过光谱完全表征,电化学,以及理论研究。有趣的是,digermirane 2分发生反应比更有效地disiliranes 1和1b中,因为其良好的电子给体性质的,并降低围绕葛位阻 Ge结合。1,4-加合物结构3,4,5通过单晶X射线晶体分析是明确确定。电化学和理论研究表明,1,4加合物的最高占据分子轨道(HOMO)和最低未占据分子轨道(LUMO)之间的能隙明显小于Lu 3 N @ I h‐ C 80,因为给电子基团有效地提高了HOMO能级。还可以观察到,基于氧化还原特性以及4和5的HOMO-LUMO能量,胚芽基比甲硅烷基的给电子性更高。。双甲硅烷基化和双甲硅烷基化是调节内面金属富勒烯电子特性的有效且通用的方法。
Thermal Reactions of Fullerenes with Cyclic Organosilicon and Organogermanium Compounds: Silylation and Germylation of C<sub>60</sub>and C<sub>70</sub>
Thermal reactions of empty fullerenes with disilirane (1) and digermirane (2) afforded the corresponding bis-silylated and bis-germylated derivatives. When a bicyclic fused silirane (3a) was heated in the presence of C70, two silylene adducts were obtained through thermal extrusion of silylenes. These results provide a complementary method to the photochemical addition of reactive silicon and germanium