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Epoxidation of olefins using a novel synthesized tungsten dendritic catalyst
(2017-11-01)
In this work, we carry out the preparation and characterization of new dendritic catalyst from an oligomer polyhedral silsesquioxane core (POSS-DG2.0). This material was used in the immobilization of the [W(CO)3Br2(NCMe)2] ...
Nanoparticles of tungsten as low-cost monometallic catalyst for selective hydrogenation of 3-hexyne
(Sociedade Brasileira de Química, 2016-01)
Low-cost tungsten monometallic catalysts containing variable amounts of metal (4.5, 7.1 and 8.5%W) were prepared by impregnating alumina with ammonium metatungstate as an inexpensive precursor. The catalysts were characterized ...
Reactivity of Tungsten-aryloxides with Hydrosilane Cocatalysts in Olefin Metathesis
(Sociedade Brasileira de Química, 2014)
Reactivity of tungsten-aryloxides with hydrosilane cocatalysts in olefin metathesis
(Soc Brasileira Quimica, 2002-01-01)
The reactivity of the [WCl4(OAr)(2)] (OAr = O-2,6-C3H3Cl2, O-2,6-C6H3F2 and O-C6H3Me2) systems, plus the silicon compounds Ph2SiH2 and polymethylhydrosiloxane (PMHS), were studied in metathesis reactions. The olefins used ...
A comparative study of hydrosilane compounds as cocatalysts in the metathesis of 1-hexene
(Elsevier B.V., 1998-12-21)
The selectivity of I-hexene metathesis using WCI6 as catalyst was evaluated with a series of hydrosilane-compounds as cocatalysts: Ph3SiH, Ph2SiH2, PhSiH3 and polymethylhydrosiloxane (PMHS). The metathesis reaction is ...