- Waste-free and efficient hydrosilylation of olefins
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High purity silicone precursors can now be synthesized by hydrosilylation of solvent-free olefins catalyzed by a highly stable and active glass hybrid catalyst consisting of mesoporous organosilica microspheres doped with Pt nanoparticles. These findings open the door to the sustainable manufacture of silicone and a way to further reduce the amount of platinum in silicones, which are ubiquitous advanced polymers with multiple uses and applications.
- Pandarus, Valerica,Ciriminna, Rosaria,Gingras, Geneviève,Béland, Fran?ois,Kaliaguine, Serge,Pagliaro, Mario
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p. 129 - 140
(2019/01/11)
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- Catalytic activity of bis(dialkylamino)carbenium salts in hydrosilylation reactions
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Bis(dialkylamino)carbenium salts {[(Me2N)2CCl]+}2MCl4 2- (M = Ni, Pd) and {[Me2NC(X)NR2]+}2PtCl62- (R = Me, All; X = H, Cl, Me) are efficient catalysts for hydrosilylation of allyl phenyl ether, triallylamine, allyl chloride, allylamine, and 1-octene with various hydrosilanes. The catalytic activity is dependent on the salt composition and the nature of the metal M, the saturated compound, and the hydrosilane used. The catalysts used are usually insoluble in the reaction mixture, active, and stable. In some cases, carbenium salts are more selective than Speier's catalyst. Novel catalysts, silica-immobilized dialkylaminocarbenium salts, have been prepared. The kinetics of the reaction have been considered.
- Chernyshev,Belyakova,Sheludyakov,Shevchenko
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p. 1003 - 1006
(2007/10/03)
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