18899-76-8Relevant academic research and scientific papers
Synthesis of divalent ytterbium terphenylamide and catalytic application for regioselective hydrosilylation of alkenes
Shi, Yinghua,Li, Jianfeng,Cui, Chunming
, p. 10957 - 10962 (2017)
The dimeric heteroleptic ytterbium amido complex [(2,6-(3,5-Me2C6H3)2C6H3NH)Yb(N(SiMe3)2)]2 (1) has been prepared and characterized. This divalent terphenyl
Rare-Earth-Catalyzed Regioselective Hydrosilylation of Aryl-Substituted Internal Alkenes
Liu, Jinxi,Chen, Wufeng,Li, Jianfeng,Cui, Chunming
, p. 2230 - 2235 (2018)
Rare-earth-catalyzed regioselective hydrosilylation of internal alkenes with an ene-diamido samarium alkyl as a precatalyst has been described. The samarium alkyl complex LSmCH2SiMe3(THF)2 (2, L = DipNC(Me)C(Me)NDip, where Dip = 2,6-iPr2C6H3) enabled highly regioselective hydrosilylation of aryl-substituted internal alkenes with primary silanes, leading to the selective formation of a series of secondary silanes in high yields.
Structural and mechanistic investigation of a cationic hydrogen-substituted ruthenium silylene catalyst for alkene hydrosilation
Fasulo, Meg E.,Lipke, Mark C.,Tilley, T. Don
, p. 3882 - 3887 (2013/09/23)
The cationic ruthenium silylene complex [Cp*(iPr 3P)Ru(H)2(SiHMes)][CB11H6Br 6], a catalyst for olefin hydrosilations with primary silanes, was isolated and characterized by X-ray crystallography. Relatively strong interactions between the silylene Si atom and Ru-H hydride ligands appear to reflect a highly electrophilic silicon center. The mechanism of olefin hydrosilation was examined by kinetics measurements and other experiments to provide the first experimentally determined mechanism for the catalytic cycle. This mechanism involves a fast, initial addition of the Si-H bond of the silylene complex to the olefin. Subsequent elimination of the product silane produces an unsaturated intermediate, which can be reversibly trapped by olefin or intercepted by the silane substrate. The latter reaction pathway involves activation of the reactant silane by Si-H oxidative addition and α-hydrogen migration to regenerate the key silylene intermediate.
Alkene hydrosilation by a cationic hydrogen-substituted iridium silylene complex
Calimano, Elisa,Tilley, T. Don
supporting information; body text, p. 9226 - 9227 (2009/02/02)
A cationic hydrogen-substituted iridium silylene complex [(PNP)(H)Ir=Si(Mes)H][B(C6F5)4] (2) was synthesized via hydride abstraction from the corresponding neutral iridium silyl hydride complex. DFT calculations for 2 indicate that the cationic charge is localized at the silicon center and depict a LUMO with predominant silicon p-orbital character. Notably, complex 2 reacts rapidly with unhindered alkenes at ambient temperatures to afford disubstituted silylene complexes via Si-C bond formation. Complex 2 is also the catalyst for alkene hydrosilation of primary silanes with a high degree of anti-Markovnikov selectivity. Copyright
