%0 Journal Article
%T Reactivity of Tungsten-aryloxides with Hydrosilane Cocatalysts in Olefin Metathesis
%A Baibich
%A Ione M.
%A Kern
%A Carla
%J Journal of the Brazilian Chemical Society
%D 2002
%I Sociedade Brasileira de Qu¨Şmica, SBQ
%R 10.1590/S0103-50532002000100006
%X 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 were methyl-10-undecenoate and 1-hexene. the results showed that the [wcl4(oar)2]-silicon compound systems are active and selective when the aryloxide ligand contain electronegative groups. the silicon compound pmhs proved to be the best cocatalyst for metathesis, even with the [wcl4(o-2,6-c6h3me 2)2] compound, which has no electronegative substituents. because it is non-toxic, non-volatile, easy to handle and cheap, pmhs is a good alternative cocatalyst in metathesis reactions.
%K tungsten catalysts
%K hydrosilane cocatalysts
%K olefin metathesis.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532002000100006&lng=en&nrm=iso&tlng=en