“Donor–Acceptor” Oligogermanes: Synthesis, Structure, and Electronic Properties
摘要:
A series of oligogermanes, (Me3Si)(3)GeGeCl3, (C6F5)(3)GeGePh3, (C6F5)(3)GeGe(p-Tol)(3), and (C6F5)(2)Ge[Ge(p-Tol)(3)](2), containing substituents with different electronic properties at neighboring germanium atoms were synthesized. According to X-ray diffraction studies, UV/visible spectroscopy, and quantum chemical calculations, these "donor-acceptor" oligogermanes are characterized by energies of electronic transitions lower than those for other similar compounds.
Preparation and structural characterization of trimethylsilyl-substituted germylzinc halides, (Me3Si)3GeZnX (X=Cl, Br, and I) and silylzinc chloride, R(Me3Si)2SiZnCl (R=SiMe3 and Ph)
摘要:
The trimethylsilyl-substituted germylzine halides, (Me3Si)(3)GeZnX (X = Cl, Br, and 1), and silylzinc chlorides, R(Me3Si)(2)SiZnCl (R = SiMe3, Ph), have been prepared and their molecular structures have been full determined by spectroscopic and single-crystal Xray diffraction methods. The germylzinc halides and silylzinc chlorides have dimeric structures consisting of two mu-halogen atoms. The reactivity of germylzinc chloride with substrates is also examined. (C) 2003 Elsevier Science B.V. All rights reserved.
synthesis and properties of β-fluoro- and chlorodisilanides. The reaction of the functionalized neopentasilanes (Me3Si)3SiSiPh2NEt2 and (Me3Si)3SiSiMe2OMe with KOtBu in the presence of 18-crown-6 provided access to structurally related β-alkoxy- and amino-substituted disilanides. The obtained Et2NPh2Si(Me3Si)2SiK·18-crown-6 was converted to a magnesium silanide and further on to Et2NPh2Si(Me3Si)2Si-substituted
The reactions of germenes generated thermally from pivaloyl- and adamantoyltris(trimethylsilyl)germane with 1,3-butadienes
作者:Akinobu Naka、Shinsuke Ueda、Mitsuo Ishikawa
DOI:10.1016/j.jorganchem.2007.02.011
日期:2007.5
The thermolysis of pivaloyl- and adamantoyltris(trimethylsilyl)germane in the presence of 2,3-dimethyl- and 2,3-diphenyl-1,3-butadiene gave the respective adducts derived from [2+4] cycloaddition of the germenes with butadienes in good yields.
Radical Cyclizations of Acylgermanes. New Reagent Equivalents of the Carbonyl Radical Acceptor Synthon
作者:Dennis P. Curran、Ulf Diederichsen、Michael Palovich
DOI:10.1021/ja970219m
日期:1997.5.1
varied over 2 orders of magnitude by changing the germanium substituents. Acyltriarylgermanes are among the best radical acceptors yet identified, and this quality makes them superior reagent equivalents of the carbonyl radical acceptor synthon. Parent cyclizations in the 4-exo and 7-exo modes fail. Attempted 3-exo cyclization results in a 1,2-acyl shift...
[(Me3Si)3X1X2(SiMe3)3] (X1, X2 = Si, Ge, or Sn) together with some related compounds bearing triisopropylsilyl or -stannyl groups are characterized by single-crystal X-ray crystallography. The structural data are compared to similar compounds already known. The interaction of silyl groups connected to different central atoms such as Si, Ge, and Sn is analyzed.
一些新合成的类型为[(Me 3 Si)3 X 1 X 2(SiMe 3)3 ](X 1,X 2 = Si,Ge或Sn)的化合物以及一些带有三异丙基甲硅烷基或-锡烷基的相关化合物。通过单晶X射线晶体学表征。将结构数据与已知的类似化合物进行比较。分析了连接到不同中心原子(例如Si,Ge和Sn)的甲硅烷基的相互作用。
Synthesis of some tris(trimethylsilyl)germyl compounds
作者:A.G. Brook、F. Abdesaken、H. Söllradl
DOI:10.1016/0022-328x(86)84028-1
日期:1986.1
A variety of compounds containing the tris(trimethylsilyl)germyl group were prepared and characterized spectroscopically. Photolysis of adamantoyltris(trimethylsilyl)germane failed to yield the isomeric germene: in CCl4 the photolysis appeared to occur by a Norrish type 1 process.