A straightforward method for the preparation of the cyclotrigermene cyclo-[(R3Si)4Ge3] 2 (R = SiMetBu2), based on the thermolysis of the digermene (R3Si)2Ge═Ge(SiR3)21, is presented.
Spirobis(pentagerma[1.1.1]propellane): A Stable Tetraradicaloid
作者:Yuki Ito、Vladimir Ya. Lee、Heinz Gornitzka、Catharina Goedecke、Gernot Frenking、Akira Sekiguchi
DOI:10.1021/ja401650q
日期:2013.5.8
we report a spirobis(pentagerma[1.1.1]propellane) derivative as a novel type of molecular architecture in cluster chemistry that features two spiro-fused [1.1.1]propellane units and represents a stable tetraradicaloid species. The crucial issue of the nature of the interaction between the germanium bridgeheads was probed computationally, revealing weak bonding interactions between the formally unpaired
SiGe2 and Ge3: Cyclic Digermenes that Undergo Unexpected Ring-Expansion Reactions
作者:Vladimir Ya. Lee、Hiroyuki Yasuda、Masaaki Ichinohe、Akira Sekiguchi
DOI:10.1002/anie.200501885
日期:2005.10.7
Heavy cyclopropene analogues R4SiGe2 and R4Ge3 (R = SiMe Bu2) – New members of the cyclic digermenes family
作者:Vladimir Ya. Lee、Hiroyuki Yasuda、Masaaki Ichinohe、Akira Sekiguchi
DOI:10.1016/j.jorganchem.2006.03.049
日期:2007.1
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.