6207-41-6Relevant academic research and scientific papers
Introduction of organogermyl functionalities to cage silsesquioxanes
Fra?ckowiak, Dawid,Grzelak, Magdalena,Januszewski, Rafa?,Marciniec, Bogdan
supporting information, p. 5055 - 5063 (2020/05/13)
In this work, we present the first example of highly efficient platinum-catalyzed hydrosilylation of vinyl- and allylgermanes with different types of silsesquioxanes and spherosilicates. This protocol allows the straightforward introduction of organogermyl functionalities with alkyl chains linked to the silsesquioxane core with good yields and excellent selectivity. These derivatives may be applied as precursors for the development of advanced hybrid materials in the future. In addition, a comparison made between vinylsilanes and vinylgermanes showed a higher reactivity of germanium compounds in the hydrosilylation reaction. To the best of our knowledge, this is the first literature example of the functionalization of silsesquioxanes and spherosilicates with these types of germanium derivatives. The reaction parameters and kinetics were determined by in situ FT-IR. In addition, our research is supported by extensive data obtained from NMR measurements.
New catalytic route to alkynylgermanes
Marciniec, Bogdan,LAwicka, Hanna,Dudziec, Beata
, p. 5188 - 5192 (2008/10/09)
Vinyl-trisubstituted germanes react selectively with terminal alkynes in the presence of compounds containing Ru-H and Ru-Ge bonds with formation of functionalized alkynylgermanes. The reaction opens the first transition metal catalytic route for the preparation of this class of organogermanes, which are useful reagents for organic synthesis. The mechanism elucidated by NMR spectroscopic study of stoichiometric reactions shows that this process is a new catalytic activation of an sp-hybridized C-H bond involving the previously discovered activation of the =C-Ge bond.
