Catalytic silylation of O–nucleophiles via Si–H or Si–C bond cleavage: A route to silyl ethers, silanols and siloxanes

Formation of nanostructured silicas through the fluoride catalysed self-polymerization of Q-type functional silica cages

“…From gas analysis results, we anticipated that the reaction must involve the release of H − post pentacoordinated intermediate formation in a first step post F − attack. These reactions are confirmed from the literature, 17–19 with F − effectively displacing H − from a pentacoordinate intermediate of trimethylsilane being known since at least 1973. 20 After F − attacks, released H − reacts with either a proton source ( i.e.…”

“…Reactions in acetone and methanol led to rapid gas release, but gels and/or precipitates were not observed until solvent removal, likely due to potential reactivity of the F À activated Q-cage with the solvent as competing pathways. 17,23 Reactions in toluene led to direct gel formation, while 1 : 1 DCM : ACN gave both gels and foams.…”

Transition Metal‐Free Catalytic C−H Silylation of Terminal Alkynes with bis(Trimethylsilyl)acetylene Initiated by KHMDS

“…In contrast, the concept of using silylacetylenes as an atypical coupling partner has occasionally been deployed and these strategies are not without their own disadvantage, including the use of fluoride reagents or/and expensive crown ethers, harsh conditions, lower chemoselectivity (e. g., the dimerization of phenylacetylenes) and narrow substrate scope. [22][23][24][25] Sustainable and eco-friendly synthetic approaches proceeded by the main-group catalysis have gained recent significant attention, [26][27][28][29][30][31][32][33][34][35][36] especially due to the fact of the high abundance of such catalytic species. This in turn, in combination with scientifically important CÀ H and XÀ H/C bond activations (where X = Si, B, Ge, etc.)…”

“…Sustainable and eco‐friendly synthetic approaches proceeded by the main‐group catalysis have gained recent significant attention, [26–36] especially due to the fact of the high abundance of such catalytic species. This in turn, in combination with scientifically important C−H and X−H/C bond activations (where X=Si, B, Ge, etc.)…”

Reduction of N2O with hydrosilanes catalysed by RuSNS nanoparticles

“…13 This process could contribute to the use of waste N 2 O in the context of a circular economy, and complement current methods for silane oxidation based on the use of H 2 O, H 2 O 2 and O 2 . 14 Metal nanoparticles (NPs) have been widely employed in a diverse range of catalytic processes due to their particular electronic configurations and much larger surface areas when compared with bulk metals. 15 The preparation of NPs through the decomposition of an organometallic precursor with H 2 in the presence of substoichiometric amounts of a ligand, as pioneered by Chaudret, Philippot et al, provides materials possessing well-controlled size, shape and surface state.…”