Heavy cyclopropene analogues R4SiGe2 and R4Ge3 (R = SiMetBu2) -: New members of the cyclic digermenes family
Heavy cyclopropene analogues R4SiGe2 and R4Ge3 (R = SiMetBu2) -: New members of the cyclic digermenes family
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DOI：
10.1016/j.jorganchem.2006.03.049
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发表时间：
2007-01-01
影响因子：
2.3
通讯作者：
Sekiguchi, Akira
中科院分区：
文献类型：
--
作者：
Lee, Vladimir Ya.;Yasuda, Hiroyuki;Sekiguchi, Akira
以四氯二茂铁RGeCl2-GeCl2R分别与二锂硫硅烷R2SiLi2和二锂硫锗R2GeLi2反应，合成了具有Ge=Ge双键的1H-硅二茂烯R4SiGe2(2a)和1H-三茂烯R4Ge3(2b)(R=Sime‘bu，R)。2a的骨架Ge=Ge双键是反转的(51(2)度)，键距为2.2429(6)埃。作为扩环反应的结果，2a和2b都与CH2Cl2反应，形成了不寻常的四元环化合物5a和5b。具有Si=Si双键的1H-三硅烯7a和~3H-二硅杂环烯7b也与CH2Cl2顺利反应，分别得到四元环系8a和8b。(C)2006爱思唯尔B.V.保留所有权利。
1H-Siladigermirene R4SiGe2 (2a) and 1H-trigermirene R4Ge3 (2b) (R = SiMe'Bu,) with a Ge=Ge double bond were synthesized by the reaction of tetrachlorodigermane RGeCl2-GeCl2R with dilithiosilane R2SiLi2 and dilithiogermane R2GeLi2, respectively. The skeletal Ge=Ge double bond of 2a is trans-bent (51.0(2)degrees) with a bond distance of 2.2429(6) angstrom. The reaction of both 2a and 2b with CH2Cl2 resulted in the formation of unusual four-membered ring compounds 5a and 5b as a result of a ring expansion reaction. 1H-Trisilirene 7a and 3H-disilagermirene 7b with an Si=Si double bond also smoothly reacted with CH2Cl2 to yield the four-membered ring systems 8a and 8b, respectively. (c) 2006 Elsevier B.V. All rights reserved.