10217-34-2Relevant articles and documents
Highly-active, graphene-supported platinum catalyst for the solventless hydrosilylation of olefins
Kong, Caleb J.,Gilliland, Stanley E.,Clark, Brian R.,Gupton, B. Frank
, p. 13343 - 13346 (2018)
Herein we report the development of the first graphene-supported platinum catalyst that has demonstrated exceptional catalytic activity and stability for hydrosilylation reactions of olefins (TOF 4.8 × 106 h-1, TON = 9.4 × 106). The catalyst also exhibited functional group tolerance over a broad range of industrially relevant substrates with minimal metal leaching. In addition, the catalyst system was successfully translated into a packed bed platform for continuous hydrosilylation reactions.
Organic silicon coupling agent and preparation method thereof
-
Paragraph 0090-0093, (2019/10/01)
The invention provides an organic silicon coupling agent and a preparation method thereof. The method is characterized in that a silane group-containing molecule and an alkylene group-containing molecule undergo a hydrosilylation reaction under the catalysis of a highly selective hydrosilylation catalyst to generate the organic silicon coupling agent. The highly selective hydrosilylation catalystutilizes alkene and platinum atoms to form a weak coordination bonds in order to facilitate the activation of the platinum atoms, an organic cage ligand avoids the agglomeration of the platinum atoms,and a spatial three-dimensional structure formed by the complex catalyst can produce a very large steric hindrance, so the selectivity of the hydrosilylation product is greatly improved. The preparation method of the invention is used to prepare the novel coupling agent by a hydrosilylation reaction which cannot be catalyzed by a Karstedt's catalyst.
Mode of activation of cobalt(II) amides for catalytic hydrosilylation of alkenes with tertiary silanes
Liu, Yang,Deng, Liang
supporting information, p. 1798 - 1801 (2017/02/15)
Cobalt(II) complexes capable of catalyzing alkene hydrosilylation in the absence of external activators are rarely known, and their activation mode has remained poorly understood. We present here that cobalt(II) amide complexes, [Co(N(SiMe3)2)2] and its NHC adducts [(NHC)Co(N(SiMe3)2)2] (NHC = N-heterocyclic carbene), are effective catalysts for the hydrosilylation of alkenes with tertiary silanes. Mechanistic studies revealed that cobalt(II) amides can react with hydrosilane to form cobalt(I) species, silylamide, and hydrogen, which serves as the entry to the genuine catalytically active species, presumably cobalt(I) species, for the cobalt-catalyzed hydrosilylation reaction.