68816-03-5Relevant articles and documents
Low-temperature Syntheses of Polysilanes and Polygermanes in Diethyl Ether
Cragg, R. Harry,Jones, Richard G.,Swain, Anthony C.,Webb, Samantha J.
, p. 1147 - 1148 (1990)
Both soluble and insoluble polysilanes and an insoluble polygermane have been prepared in high yield and at moderate temperature from the interactions of alkylaryl-, diaryl-, and dialkyl-dichlorosilanes and diphenyldichlorogermane with sodium sand in the
Synthesis, absorption characteristics and some reactions of polygermanes
Mochida, Kunio,Chiba, Hiromi
, p. 45 - 54 (1994)
A number of high molecular weight polygermanes were prepared by an improvement on Wurtz coupling reactions of dichlorogermanes and sodium metal, and by a method using diiodogermylene and Grignard reagents (or organolithiums).Most of the polygermanes thus prepared showed a narrow molecular distribution containing molecular weights 103-104.In solution, the polygermanes showed characteristic electronic absorption bands at 300-350 nm and were strongly thermochromic for alkyl-substituted derivatives.Photolysis of the polygermanes proceeded by both contraction of the chain with loss of diorganogermylenes and homolytic scission of the germanium-germanium ? bond. Key words: Germanium; Polygermane; Photochemistry
New (diarylgermyl)lithiums
Castel,Riviere,Satge,Ko
, p. 205 - 210 (2008/10/08)
The new (diarylgermyl)lithiums R2GeHLi (2; R = phenyl, mesityl) were prepared in good yields by hydrogermolysis reactions of tert-butyllithium in THF. The stability of compounds 2 depends on the nature of the R group and the solvent. For R = Ph, in the presence of an amine (Et3N or Et2NMe), the same reaction leads to the formation of the polygermanes H(GePh2)nH (n = 2-4). The characterization of compounds 2 by IR and 1H and 13C NMR spectroscopy and their complexation with a crown ether are also reported. They are characterized by deuterolysis and alkylation reaction (with MeI and Me2SO4). Their germylation reactions with Ge-Cl reagents constitute a convenient way for synthesizing organo-hydropolygermanes. Compounds 2 also react with acyl chlorides to give new germyl ketones, R2HGeCOR′, and the unexpectedly stable β-germyl diketone Ph2Ge(COMes)2.
