2023
DOI: 10.1002/cplu.202200295
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Silane‐Bearing Borasilsesquioxanes: Synthetic Protocol and Unsuspected Redistribution Reactions

Abstract: The presented work is a continuation of research on the reactivity of unsaturated borasilsesquioxanes under the conditions of common organometallic transformations. The catalytic hydrosilylation reaction with silanes, siloxanes and silsesquioxanes in presence of platinum catalyst was explored. The majority of the products were obtained in high yields (> 90 %) and their structures were confirmed and characterized by spectroscopy and spectrometry, i. e. NMR and MALDI-TOF-MS.The most significant segment of the wo… Show more

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“…In the presented work, 4-ethynylphenylsilsesquioxanes were obtained by condensation with silanols, similarly to in our previous articles [ 37 , 38 ]. The next step involved functionalization by the catalytic hydrosilylation of the ethynyl bond ( Figure 1 ).…”
Section: Resultsmentioning
confidence: 86%
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“…In the presented work, 4-ethynylphenylsilsesquioxanes were obtained by condensation with silanols, similarly to in our previous articles [ 37 , 38 ]. The next step involved functionalization by the catalytic hydrosilylation of the ethynyl bond ( Figure 1 ).…”
Section: Resultsmentioning
confidence: 86%
“…Compared to the vinyl equivalent of silsesquioxane, the reaction with trimethylsilane occurs, and this may be due to the higher polarity of the ethynyl group and the strong electron-withdrawing effect [ 44 ]. In the case of a reaction with triethoxysilane, a complex reaction mixture is also formed and a back-biting reaction takes place, i.e., a redistribution reaction involving the transfer of an alkoxy group from silane to boron, occurring between siloxyboranes and alkoxysilanes [ 38 ]. The high conversion in reactions with siloxanes (PDMS, HMTS, TMDS-OD) prompted us to perform tests with more complex structures—silsesquioxanes.…”
Section: Resultsmentioning
confidence: 99%
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