894804-43-4Relevant articles and documents
Preparation of oligogermanes via the hydrogermolysis reaction
Subashi, Esla,Rheingold, Arnold L.,Weinert, Charles S.
, p. 3211 - 3219 (2008/10/09)
The hydrogermolysis reaction has been shown to be useful for the formation of germanium-germanium bonds. The Ge - Ge bond forming reaction involves a germanium amide and a germanium hydride and requires the use of acetonitrile as the solvent. A key factor in the formation of the Ge - Ge bond involves reaction of the germanium amide R3GeNMe2 with acetonitrile solvent to furnish an α-germylated nitrile R3GeCH2CN which contains a labile Ge - C bond. This species undergoes subsequent reaction with a germanium hydride R3GeH to form the Ge - Ge bond. Using this method, the digermanes Bun3GeGePh3 and Et 3GeGePh3 have been obtained and their X-ray crystal structures have been determined. The preparation of three synthons for stepwise oligogermane chain buildup, R2Ge(NMe2)CH 2CH2OEt (R = Et, Bu, Ph), has also been achieved. These synthons react with Ph3GeH in CH3CN to afford the corresponding digermanes, which in the case of R = Et and Bu undergo subsequent reaction with DIBAL-H to generate a digermane hydride. The ethyl and n-butyl digermane hydrides then are subsequently reacted with an additional equivalent of the appropriate synthon to produce the corresponding trigermanes, and repetition of these two steps furnishes the tetragermanes Ph 3GeGe(R2)Ge(R2)Ge(R2)CH 2CH2OEt (R = Et, Bu). Thus, in this study two new series of oligomeric organogermanium species have been prepared and fully characterized.
